Exhibit 4(b).2

EXECUTION VERSION



| |  |                     |  |                                                                                                                         
| |  | ------------------- |  | ------------------------------------------------------------------------------------------------------------------------
| |  | Dated 31 March 2017 |  | Confidential portions of this exhibit have been omitted and filed separately with the Securities and Exchange Commission

NATIONAL GRID HOLDINGS ONE PLC

and

QUADGAS
INVESTMENTS BIDCO LIMITED

FURTHER ACQUISITION AGREEMENT

relating to the acquisition of shares in GasD HoldCo (as defined herein)



LOGO

Linklaters LLP

One Silk Street

London EC2Y 8HQ

Telephone (44-20) 7456 2000

Facsimile (44-20) 7456 2222

Ref L-226975



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FOIA confidential treatment requested: [***] indicates that certain information
contained herein has been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to such omitted portions.



Table of Contents



|                                                         |  |      |    | 
|-------------------------------------------------------- |  | ---- | -- | 
|Contents                                                 |  | Page |   
|                                                         | 
|1    Interpretation                                      |  |      | 1  | 
|                                                         | 
|2    Acquisition of the Further Sale Assets              |  |      | 7  | 
|                                                         | 
|3    Consideration                                       |  |      | 8  | 
|                                                         | 
|4    Sell Notice and Purchase Notice                     |  |      | 9  | 
|                                                         | 
|5    Conditions                                          |  |      | 10 | 
|                                                         | 
|6    Further Closing                                     |  |      | 11 | 
|                                                         | 
|7    Warranties                                          |  |      | 13 | 
|                                                         | 
|8    Confidentiality                                     |  |      | 13 | 
|                                                         | 
|9    Other Provisions                                    |  |      | 14 | 
|                                                         | 
|Schedule 1 Further Closing Obligations (Clause 6.2)      |  |      | 21 | 
|                                                         | 
|Schedule 2 Sellers Warranties (Clause 7.1)              |  |      | 22 | 
|                                                         | 
|Schedule 3 Warranties given by the Investor (Clause 7.2) |  |      | 23 | 
|                                                         | 
|Schedule 4 Limits and Claims                             |  |      | 24 | 
|                                                         | 
|Schedule 5 [***]                                         |  |      | 29 | 
|                                                         | 
|Schedule 6 Sell Notice                                   |  |      | 30 | 
|                                                         | 
|Schedule 7 Purchase Notice                               |  |      | 31 | 





i



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Further Acquisition Agreement

This Agreement is made as a deed on 31 March 2017between:



|(1) | NATIONAL GRID HOLDINGS ONE PLC a company incorporated in the United Kingdom with registered number 2367004 and whose registered office
is at 1-3 Strand, London WC2N 5EH, United Kingdom (the Seller); and
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|(2) | QUADGAS INVESTMENTS BIDCO LIMITED a company incorporated in the United Kingdom with registered number 10487004 and whose registered office is
at 18 St Swithins Lane, London EC4N 8AD and whose former name was Tellsid Investments Limited (the Investor).
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Whereas:



|(A) | On 8 December 2016:
|--- | -------------------



| | (i) | the Seller and the Investor entered into the Acquisition Agreement relating to, amongst other things, the subscription of Shares and the acquisition
by GasD MidCo of GasD OpCo and GasD PropCo; and
| | --- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (ii) | the Seller and the Investor entered into a memorandum of understanding relating to the acquisition of Further Shares in GasD HoldCo.
| | ---- | ------------------------------------------------------------------------------------------------------------------------------------



|(B) | On 10 February 2017, GasD HoldCo was incorporated.
|--- | --------------------------------------------------



|(C) | Pursuant to this Agreement the Seller has agreed to sell and the Investor has agreed to purchase:
|--- | -------------------------------------------------------------------------------------------------



| | (i) | the Further Shares; and
| | --- | -----------------------



| | (ii) | the Further Debt.
| | ---- | -----------------

It is agreed as follows:



|1 | Interpretation
|- | --------------

In this deed (the Agreement), unless the context otherwise requires, the provisions in this Clause 1 apply:



|1.1 | Definitions
|--- | -----------

Acquisition Agreement means the agreement entered into on 8 December 2016 (as amended from time to time) between the Investor and the Seller (which has or will have subsequently
been acceded to by GasD HoldCo, GasD PledgeCo and GasD Midco) relating to, amongst other things, the subscription of Shares and the acquisition by GasD MidCo of GasD OpCo and GasD PropCo;

Additional Investment has the meaning given to it in Clause 2.3;

Agreed Form means, in relation to any document, such document in the form agreed between the Seller and
the Investor and signed for identification by the Investors Lawyers and the Sellers Lawyers on the date of the Acquisition Agreement with such alterations as may be agreed in writing between the Seller and the Investor from time to time;

Affiliate has the meaning given to it in the Shareholders Agreement;





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FOIA confidential treatment requested: [***] indicates that certain information
contained herein has been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to such omitted portions.



[***]

Business Day means a day which is not a Saturday, a Sunday or a public holiday in England;

Claim means any claim arising out of or in connection with any Transaction Document excluding:
(i) any claim for breach of the Sellers Warranties; or (ii) any Cornerstone Claim;

Closing means the completion of the acquisition of GasD OpCo and GasD PropCo by GasD MidCo pursuant to
the Acquisition Agreement;

Closing Date means the date on which Closing takes place;

Competent Authority means: (i) any person (whether autonomous or not) having legal
and/or regulatory authority and/or enforcement powers, including Gas and Electricity Markets Authority, Office of Gas and Electricity Markets, the Health and Safety Executive, the European Commission and the Competition and Markets Authority;
(ii) any court of law or tribunal in any jurisdiction; and/or (iii) any Tax Authority;

Confidentiality Agreements means each of the confidentiality agreements pursuant to which NG plc made
available to the recipient named therein certain confidential information relating to the Sellers Group entered into with: (i) Macquarie Infrastructure and Real Assets (Europe) Limited dated 28 July 2016 (as amended); (ii) Dalmore
Infrastructure Investments 2 Limited Partnership dated 1 August 2016 (as amended); (iii) Dalmore Infrastructure Investments 2 Limited Partnership dated 24 August 2016 (as amended); (iv) Allianz Capital Partners GmbH, London Branch dated
27 July 2016; (v) Amber Infrastructure Limited dated 25 July 2016 (as amended); (vi) CIC Capital Corporation dated 4 August 2016 (as amended); and (vii) Hermes GPE LLP dated 4 August 2016 (as amended) and
Confidentiality Agreement means any one of them;

Cornerstone Claim means
any claim for a breach of the Sellers obligations under Clauses 2.1 and 2.2;

CTA 2010
means the Corporation Tax Act 2010;

Debt means the principal amount of any loans,
borrowings or indebtedness (together with any accrued interest) provided to GasD HoldCo by a Shareholder, its Affiliates or any Investor Shareholder Affiliate, including any new Debt contributed by any of the Shareholders between Closing and Further
Closing, but shall exclude any loans, borrowings or indebtedness provided to GasD HoldCo in the ordinary course of business which is not in connection with such Shareholders holding of Shares;

Debt Capitalisation means the capitalisation of Debt pursuant to the Post-Closing Implementation Steps;

Debt Capitalisation Shares means any Shares issued as a result of the Debt Capitalisation
(including any such Shares as consolidated, subdivided or redesignated on a non-dilutive basis);

Distribution Amount means the total amount of any (i) dividends, or other distribution of profits or assets (including any distribution as defined in Part 23 of the CTA 2010),
actually paid or declared but not yet paid in respect of the Shares; and (ii) any interest on, and any principal of, any Debt actually paid or repaid, in each case prior to Further Closing;

Encumbrance means any claim, charge, mortgage, lien, option, equitable right, power of sale, pledge,
hypothecation, retention of title, right of pre-emption, right of first refusal or





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FOIA confidential treatment requested: [***] indicates that certain information
contained herein has been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to such omitted portions.



other third party right or
security interest of any kind or an agreement, arrangement or obligation to create any of the foregoing;

Escalation Factor means:

[***]

Further Acquisition Payment means the
consideration to be paid by the Investor to the Seller for the Further Sale Assets, being a sum equal to:





| |  |                          |    |    |  |                                |  |    |  |    |  | 
| |  | ------------------------ | -- | -- |  | ------------------------------ |  | -- |  | -- |  | 
| |  | {(Investor Loan Amount x |    | 14 |  | ) minus (Distribution Amount x |  | 14 |  | )} |  | 
| |  |                          | 61 |    |  | 100                            |  |    | 

x

the Escalation Factor

Further Closing means
the completion of the sale and purchase of the Further Sale Assets pursuant to Clause 6;

Further
Closing Date means the date on which the Further Closing takes place;

Further
Debt means a portion of the Debt equal to the:



|              |    |    |  | 
|------------- | -- | -- |  | 
|Seller Debt x |    | 14 |  | 
|              | 39 |    | 

Further Debt Consideration has the meaning given to it in Clause 3.1.1;

Further Sale Assets means the Further Shares and the Further Debt;

Further Share Consideration has the meaning given to it in Clause 3.1.2;

Further Shares means the aggregate of:



| | (i) | 7,000 Shares or, if different as a result of a non-dilutive consolidation,
sub-division or other redesignation of the Shares (but excluding as a result of any issue of Debt Capitalisation Shares), such other number of shares in the capital of GasD HoldCo as carry the same proportion
of voting rights and rights to participate in the profits and assets of GasD HoldCo as an aggregate of 7,000 Shares have at Closing; and
| | --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (ii) | 14 per cent. of any Debt Capitalisation Shares;
| | ---- | -----------------------------------------------

GasD Group means GasD HoldCo and any GasD Group Companies from time to time;

GasD Group Companies means GasD HoldCo together with any other subsidiaries of GasD HoldCo from time to
time and GasD Group Company means any one of them;

GasD HoldCo means
Quadgas HoldCo Limited, a company incorporated in the United Kingdom with registered number 10614254 and whose registered office is at 1-3 Strand, London, WC2N 5EH, United Kingdom;

GasD MidCo means Quadgas MidCo Limited, a company incorporated in the United Kingdom with registered
number 10615396 and whose registered office is at 1-3 Strand, London, WC2N 5EH, United Kingdom;

GasD OpCo means National Grid Gas Distribution Limited, a company incorporated in the United Kingdom with registered number 10080864 and whose registered office is at 1-3 Strand, London, WC2N 5EH, United Kingdom;





3



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GasD PledgeCo means Quadgas PledgeCo Limited, a company
incorporated in the United Kingdom with registered number 10614954 and whose registered office is at 1-3 Strand, London, WC2N 5EH, United Kingdom;

GasD PropCo means Gas Distribution Property Holdings Limited, a company incorporated in the United
Kingdom with registered number 10080921 and whose registered office is at 1-3 Strand, London, WC2N 5EH, United Kingdom;

Interest has the meaning given to it in the Shareholders Agreement;

Investor Loan Amount has the meaning given to it in the Acquisition Agreement, being the amount drawn down at Closing under the loan agreement entered into between the Investor and GasD
HoldCo on the Closing Date (as adjusted pursuant to clause 7.3.3 of the Acquisition Agreement) excluding, for the avoidance of doubt, any other drawdowns or repayment of such loan;

Investor Shareholder Affiliate has the meaning given to it in the Shareholders Agreement;

Investors Group means the Investor and its subsidiaries from time to time;

Investors Lawyers means Clifford Chance LLP of 10 Upper Bank Street London, E14 5JJ;

Laws means the laws and regulations applicable to any member of the GasD Group or any
Shareholder (as appropriate) including, where applicable, the rules of any stock exchange on which the securities of a Shareholder are listed or other governmental or regulatory body to which a Shareholder is subject;

LIBOR means the London interbank offered rate administered by ICE Benchmark Administration Limited (or
any other person which takes over the administration of that rate) for pounds Sterling for the relevant period displayed on page LIBOR01 of the Thomson Reuters screen (or any replacement Thomson Reuters page which displays that rate);

Long Stop Date means 31 January 2020;

Losses means all losses, liabilities (including to Tax), costs (including reasonably incurred legal
costs and experts and consultants fees), charges, expenses, actions, proceedings, claims and demands, other than VAT that is recoverable;

NG plc means National Grid plc, a company incorporated in the United Kingdom with registered number 4031152 and whose registered office is at 1-3
Strand, London WC2N 5EH, United Kingdom;

parties means the parties to this Agreement from
time to time, and party means any one of them;

Permitted Regulatory
Condition means any bona fide mandatory and suspensory material consent, clearance, approval or permission (including, without limitation, any mandatory and suspensory regulatory or anti-trust approvals) necessary to enable the Seller to
be able to complete a transfer of the Further Sale Assets to the Investor under: (a) the rules or regulations of any stock exchange on which the Investor, the Seller or any of their Affiliates is quoted; or (b) the rules or regulations of
any governmental, statutory or regulatory body in those jurisdictions where the Seller, the Investor, GasD HoldCo or any of their Affiliates carries on business;





4



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Post-Closing Implementation Steps means the
reorganisation steps to be taken in connection with the reorganisation of the GasD Group following Closing in accordance with steps 15 to 17 (inclusive) of the document entitled Project Piccadilly Summarised Structuring Steps dated
8 December 2016 in the Agreed Form;

Purchase Notice has the meaning given to it in
Clause 4.2;

Relief includes any right to repayment of Taxation from a Tax Authority and any
relief, loss, allowance, set-off or credit in respect of Taxation and any deduction in computing or against profits for Taxation purposes;

SDRT means Stamp Duty Reserve Tax;

Sell Notice has the meaning given to it in Clause 4.1;

Seller Debt means any Debt owed by GasD HoldCo to the Seller and/or its Affiliates immediately
following the Debt Capitalisation and any new Debt contributed by the Seller and/or its Affiliates between Closing and Further Closing, reduced by the amount of any principal repayment made by GasD HoldCo prior to Further Closing;

Sellers Group means the Seller and its subsidiaries from time to time excluding, for the
avoidance of doubt, the GasD Group from the Closing Date;

Sellers Lawyers means
Linklaters LLP of One Silk Street, London EC2Y 8HQ, United Kingdom;

Sellers
Warranties means the warranties given by the Seller set out in Schedule 2, and Sellers Warranty means any one of them;

Shareholder has the meaning given to it in the Shareholders Agreement;

Shareholders Agreement means the shareholders agreement to be entered into on the Closing Date between the Seller, the Investor, GasD HoldCo, GasD OpCo and certain other
members of the GasD Group pursuant to the Acquisition Agreement;

Shares means the ordinary
shares of £1.00 each in the capital of GasD HoldCo;

Surviving Clauses means Clauses
1, 5.4, 8 and 9.2 to 9.14, and Surviving Clause means any one of them;

Tax
Authority means any taxing or other authority competent to impose any liability in respect of Taxation or responsible for the administration, assessment and/or collection of Taxation or enforcement of any law in relation to Taxation;

Taxation or Tax means all forms of taxation whether direct or indirect
and whether levied by reference to income, profits, gains, net wealth, asset values, turnover, added value or other reference and statutory, governmental, state, provincial, local governmental or municipal impositions, duties, contributions rates
and levies (including social security contributions and other payroll taxes), whenever and wherever imposed (whether imposed by way of a withholding or deduction for or on account of tax or otherwise) and in respect of any person and all penalties,
charges, costs and interest relating thereto;

Transaction means the proposed sale
of the Further Sale Assets by the Seller to the Investor pursuant to the terms of this Agreement;

Transaction Documents means this Agreement and all agreements entered into pursuant to this Agreement,
and Transaction Document means any one of them;





5



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Transfer has the meaning given to it in the
Shareholders Agreement; and

VAT means within the European Union such Taxation as may
be levied in accordance with (but subject to derogations from) Council Directive 2006/112/EC and outside the European Union any similar Taxation levied by reference to added value or sales.



|1.2 | Singular, plural, gender
|--- | ------------------------

References to one gender include all genders and references to the singular include the plural and vice versa.



|1.3 | References to persons and companies
|--- | -----------------------------------

References to:



| | 1.3.1 | a person include any company, partnership or unincorporated association (whether or not having separate legal personality); and
| | ----- | -------------------------------------------------------------------------------------------------------------------------------



| | 1.3.2 | a company include any company, corporation or body corporate, wherever incorporated.
| | ----- | ------------------------------------------------------------------------------------



|1.4 | References to subsidiaries and holding companies
|--- | ------------------------------------------------

The words holding company, parent undertaking, subsidiary and subsidiary
undertaking shall have the same meaning in this Agreement as their respective definitions in the Companies Act 2006.



|1.5 | Connected persons
|--- | -----------------

A person shall be deemed to be connected with another if that person is connected with such other within the meaning of Section 1122 of CTA 2010.



|1.6 | Schedules etc.
|--- | --------------

References to this Agreement shall include any Recitals and Schedules to it and references to Clauses and Schedules are to Clauses of, and Schedules to, this Agreement. References to paragraphs and Parts
are to paragraphs and Parts of the Schedules.



|1.7 | Headings
|--- | --------

Headings shall be ignored in interpreting this Agreement.



|1.8 | Reference to documents
|--- | ----------------------

References to any document (including this Agreement), or to a provision in a document, shall be construed as a reference to such document or provision as amended, supplemented, modified, restated or
novated from time to time.



|1.9 | Modification etc. of statutes
|--- | -----------------------------

References to a statute or statutory provision include that statute or provision as from time to time modified or re-enacted or consolidated whether before or after
the date of this Agreement so far as such modification or re-enactment or consolidation applies or is capable of applying to any transactions entered into in accordance with this Agreement provided that
nothing in this Clause 1.9 shall operate to increase the liability of any party beyond that which would have existed had this Clause been omitted.





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|1.10 | Information
|---- | -----------

References to books, records or other information mean books, records or other information in any form including paper, electronically stored data, magnetic media, film and microfilm.



|1.11 | Legal terms
|---- | -----------

References to any English legal term shall, in respect of any jurisdiction other than England, be construed as references to the term or concept which most nearly corresponds to it in that jurisdiction.



|1.12 | Non-limiting effect of words
|---- | ----------------------------

The words including, include, in particular and words of similar effect shall not be
deemed to limit the general effect of the words that precede them.



|1.13 | Extent of obligation to procure or ensure
|---- | ---------------------------------------------

If:



| | 1.13.1 | a party (the Obligor) is obliged under any provision of this Agreement to procure or ensure that
another person performs (or refrains from performing) any act; and
| | ------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 1.13.2 | the Obligor does not Control (as that term is defined in the Shareholders Agreement) the other person,
| | ------ | -------------------------------------------------------------------------------------------------------

then the Obligors obligations under that provision shall be limited to:



| | 1.13.3 | if the Obligor holds any voting securities in the capital of the other party, exercising all voting rights attaching to those securities; and
| | ------ | ---------------------------------------------------------------------------------------------------------------------------------------------



| | 1.13.4 | if the Obligor is party to any agreement relating to the management and control of the other person (including, in the case of the GasD
Group, the Shareholders Agreement), exercising all rights available to it under such agreement,
| | ------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

in each case for the purposes set out in the relevant provision of this Agreement.



|1.14 | Payments
|---- | --------

All payments to be made pursuant to or in connection with this Agreement shall be made in pounds Sterling, being the lawful currency of the United Kingdom, unless otherwise indicated.



|1.15 | Effective time
|---- | --------------

Other than in respect of the Surviving Clauses: (a) the obligations of the parties hereunder are conditional upon Closing; and (b) no party shall have any liability to the other party under this
Agreement until and unless Closing occurs.



|2 | Acquisition of the Further Sale Assets
|- | --------------------------------------



|2.1 | Further Shares
|--- | --------------



| | 2.1.1 | On and subject to the terms of this Agreement the Seller shall sell, and the Investor shall purchase, the Further Shares.
| | ----- | -------------------------------------------------------------------------------------------------------------------------





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| | 2.1.2 | The Further Shares shall be sold by the Seller with full title guarantee, free from any Encumbrances and together with all rights and
advantages attaching to them as at Further Closing (including the right to receive all dividends or distributions declared in respect of such Further Shares on or after Further Closing).
| | ----- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 2.1.3 | All of the Further Shares (and not some only) shall be acquired by the Investor.
| | ----- | --------------------------------------------------------------------------------



|2.2 | Further Debt
|--- | ------------

On and subject to the terms of this Agreement the Seller shall, or shall procure that any of its Affiliates shall, assign to the Investor the Further Debt (including any accrued but unpaid interest).



|2.3 | Additional Investment
|--- | ---------------------

If any Shares (other than the Debt Capitalisation Shares) are to be issued for value or new Debt is to be contributed by any of the Shareholders between Closing and Further Closing (the
Additional Investment), the parties undertake, following the date of this Agreement and prior to Further Closing, to enter into good faith discussions to agree, prior to such Additional Investment being completed, such amendments
to this Agreement as the parties deem necessary or appropriate to reflect the impact of (and any further consideration for) the Additional Investment, it being the intention of the parties to ensure that under this Agreement the Investor will
acquire from the Seller: (i) 14 per cent. of the entire issued share capital of GasD HoldCo; and (ii) a portion equal to 14/39 of any Debt owed by GasD HoldCo to the Seller and/or its Affiliates. For the avoidance of doubt, no amendment
made to this Agreement pursuant to this Clause 2.3 shall result in a reduction of the amount of the Further Acquisition Payment to be paid for the Further Sale Assets (as defined before giving effect to such amendment to this Agreement in respect of
the Additional Investment) in accordance with this Agreement.



|2.4 | Seller undertaking
|--- | ------------------

The Seller undertakes that it will not:



| | 2.4.1 | Transfer any Interest in any Shares, including any Debt Capitalisation Shares or sell, assign, transfer or otherwise dispose of, or grant any
option over, or create or permit to subsist any Encumbrance over Debt if and to the extent that such Transfer or such sale, transfer, disposal, grant or Encumbrance (as the case may be) would prevent the Seller from satisfying its obligations under
this Agreement consequent upon the giving of a Sell Notice or a Purchase Notice (as the case may be); or
| | ----- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 2.4.2 | issue an Offer Notice prior to the expiry of the NGHO Lock-up Period (as each such term is defined in
the Shareholders Agreement).
| | ----- | -----------------------------------------------------------------------------------------------------------------------------------



|3 | Consideration
|- | -------------



|3.1 | Amount
|--- | ------



| | 3.1.1 | The amount of the consideration for the assignment of the Further Debt under this Agreement shall be an amount equal to the sum of the
outstanding principal of, and accrued but unpaid interest on, such Further Debt as at the Further Closing Date (the Further Debt Consideration).
| | ----- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





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| | 3.1.2 | The amount of the consideration for the purchase of the Further Shares under this Agreement shall be an amount equal to:
| | ----- | ------------------------------------------------------------------------------------------------------------------------



| | (i) | the Further Acquisition Payment; less
| | --- | -------------------------------------



| | (ii) | the Further Debt Consideration,
| | ---- | -------------------------------

(the Further Share Consideration).



|3.2 | Payment of Further Acquisition Payment
|--- | --------------------------------------

The Further Acquisition Payment shall be paid by way of cash payment pursuant to Clause 6.3.



|3.3 | Adjustment to the Further Share Consideration
|--- | ---------------------------------------------

If any payment is made by the Seller to the Investor in respect of any claim for any breach of this Agreement (or any
agreement entered into under this Agreement), the payment shall be treated so far as lawfully possible as an adjustment of the Further Share Consideration that is paid by the Investor on the Further Closing Date for the Further Shares under this
Agreement and the Further Share Consideration shall be deemed to have been reduced by the amount of such payment.



|4 | Sell Notice and Purchase Notice
|- | -------------------------------



|4.1 | Sell Notice
|--- | -----------



| | 4.1.1 | In consideration of the promise by the Investor, if demanded, to pay £1 to the Seller with effect from the date of this Agreement, the
Seller may require the Investor to acquire the Further Sale Assets on the terms of this Agreement by giving the Investor not less than six months prior written notice substantially in the form set out in Schedule 6 (the Sell
Notice).
| | ----- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 4.1.2 | The Sell Notice shall specify the Further Closing Date which shall be a Business Day in the period between 1 March 2019 and 30 June
2019 (inclusive), or such other time period as the parties may agree in writing.
| | ----- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 4.1.3 | The Sell Notice, once given by the Seller, may not be revoked without the written consent of the Investor.
| | ----- | ----------------------------------------------------------------------------------------------------------



| | 4.1.4 | If the Seller has not given a Sell Notice to the Investor by 5.00 p.m. on 31 December 2018 in accordance with Clause 4.1 then Clause
4.1.1 shall terminate and the Seller shall cease to have any further rights thereunder.
| | ----- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|4.2 | Purchase Notice
|--- | ---------------

| | 4.2.1 | In consideration of the promise by the Seller, if demanded, to pay £1 to the Investor with effect from the date of this Agreement, if
the Seller has not given a Sell Notice to the Investor by 5.00 p.m. on 31 December 2018 in accordance with Clause 4.1, the Investor may at any time in the period between 1 January 2019 and 30 April 2019 require the Seller to sell the
Further Sale Assets on the terms of this Agreement by giving not less than six months prior written notice substantially in the form set out in Schedule 7 (the Purchase Notice).
| | ----- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





9



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| | 4.2.2 | The Purchase Notice shall specify the Further Closing Date which shall be a Business Day in the period between 1 July 2019 and
31 October 2019 (inclusive), or such other time period as the parties may agree in writing.
| | ----- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 4.2.3 | The Purchase Notice, once given by the Investor, may not be revoked without the written consent of the Seller.
| | ----- | --------------------------------------------------------------------------------------------------------------



| | 4.2.4 | If: (a) if the Seller has not given a Sell Notice to the Investor by 5.00 p.m. on 31 December 2018 in accordance with Clause 4.1;
and (b) the Purchaser has not given a Purchase Notice to the Seller in accordance with Clause 4.2.1 by 5.00 p.m. on 30 April 2019, then this Agreement (other than the Surviving Clauses) shall automatically terminate with immediate effect
at 5.00 p.m. on 30 April 2019 and neither the Seller nor the Investor shall have any Claim against the other under it, save in relation to any breach that occurred prior to the time of such termination.
| | ----- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|4.3 | No obligation to Serve Sell Notice or Purchase Notice
|--- | -----------------------------------------------------

This Agreement does not impose any obligation on:



| | 4.3.1 | the Seller to serve a Sell Notice; or
| | ----- | -------------------------------------



| | 4.3.2 | the Investor to serve a Purchase Notice.
| | ----- | ----------------------------------------



|5 | Conditions
|- | ----------



|5.1 | Permitted Regulatory Conditions
|--- | -------------------------------

The Investor and the Seller shall, subject to Clause 5.2.3, have the right to require that Further Closing is conditional on the satisfaction of any Permitted Regulatory Conditions or adjustments to
existing Permitted Regulatory Conditions, but only to the extent the parties agree (acting reasonably) that such permitted Regulatory Conditions (or adjustments to the same) are necessary to be able to complete lawfully the transfer of the Further
Sale Assets. This right can be exercised by the party:



| | 5.1.1 | delivering a Sell Notice or a Purchase Notice, by identifying any Permitted Regulatory Condition in its notice; or
| | ----- | ------------------------------------------------------------------------------------------------------------------



| | 5.1.2 | receiving a Sell Notice or a Purchase Notice, by delivering written notice to the other party of any Permitted Regulatory Condition within
ten (10) Business Days of its receipt of such notice.
| | ----- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|5.2 | Responsibility for satisfaction
|--- | -------------------------------



| | 5.2.1 | If either the Seller or the Investor exercises its rights under Clause 5.1, then each of the Seller and the Investor shall use all reasonable
endeavours and take all steps necessary to ensure the satisfaction of any Permitted Regulatory Condition applying to it as soon as reasonably practicable after the delivery of a Sell Notice or a Purchase Notice (as the case may be) and in any event
so as to enable Further Closing to occur before the Long Stop Date, which shall include, but not be limited to, each of the Seller and the Investor promptly providing such information in relation to itself and the Sellers Group or the
Investors Group (respectively) and any explanation or clarification of or further information in relation to any aspect of any Permitted Regulatory Condition as may be reasonably necessary to procure the satisfaction of such condition before
the Long Stop Date provided that this shall not require either party to take such action which would be likely to have such a
| | ----- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





10



---

| | detrimental effect on the current or future development of the business of that party that it would be unreasonable to expect that party to take it.
| | ----------------------------------------------------------------------------------------------------------------------------------------------------



| | 5.2.2 | Each of the Seller and the Investor shall give notice to the other of the satisfaction of any relevant Permitted Regulatory Condition
applying to it within two Business Days of becoming aware of the same.
| | ----- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 5.2.3 | Any party to whom a Permitted Regulatory Condition applies may, in its sole discretion, elect to waive, by notice in writing to the other
Parties, compliance with that requirement insofar as it relates to itself.
| | ----- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|5.3 | Process for satisfaction
|--- | ------------------------



| | 5.3.1 | Without prejudice to Clause 5.2, the Seller and the Investor agree that all requests and enquiries from any government, governmental,
supranational or trade agency, court or other regulatory body which relate to the satisfaction of any Permitted Regulatory Condition shall be dealt with by the Seller and the Investor in consultation with each other and the Seller and the Investor
shall promptly co-operate with and provide all necessary information and assistance reasonably required by such government, agency, court or body upon being requested to do so by the other.
| | ----- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 5.3.2 | The Seller and the Investor undertake to one another to prepare and submit any necessary notifications to the relevant Competent Authority
which are necessary to obtain the relevant clearance for a Permitted Regulatory Condition as soon as reasonably practicable after the date of delivery of a Sell Notice or a Purchase Notice.
| | ----- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 5.3.3 | The Seller and the Investor undertake to one another to keep one another fully informed as to progress towards satisfaction of any Permitted
Regulatory Condition applying to it and each of them shall provide the other or their nominated advisors with draft copies of the initial submissions and all material communications to the Competent Authority in relation to satisfying such
condition, allowing the other party a reasonable opportunity to provide comments on such submissions and communications before they are submitted (other than any part of such documentation and information that contains commercially sensitive
information relating to the business of the Investors Group or the Sellers Group (as the case may be) and/or is otherwise confidential in the reasonable assessment of the Investor or the Seller (respectively)).
| | ----- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|5.4 | Non-satisfaction/waiver
|--- | -----------------------

If any Permitted Regulatory Condition is not satisfied or waived by 5.00 p.m. on the Long Stop Date the Investor or the
Seller may, in its sole discretion, terminate this Agreement (other than the Surviving Clauses) and neither the Seller nor the Investor shall have any Claim against the other under it, save for any Claim arising from breach of any obligation
contained in Clause 5.2.



|6 | Further Closing
|- | ---------------



|6.1 | Date and place
|--- | --------------

Subject to Clause 5, Further Closing shall take place at 10.00 a.m. at the offices of the Sellers Lawyers on:





11



---

FOIA confidential treatment requested: [***] indicates that certain information
contained herein has been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to such omitted portions.



| | 6.1.1 | the date set out in the Sell Notice; or, if applicable
| | ----- | ------------------------------------------------------



| | 6.1.2 | the date set out in the Purchase Notice; or
| | ----- | -------------------------------------------



| | 6.1.3 | if the fulfilment or waiver of the requirement to satisfy any Permitted Regulatory Conditions (as contemplated in Clause 5) has not occurred
prior to the Further Closing Date (being such date as set out in a Sell Notice or Purchase Notice (as the case may be)), on the date being 15 Business Days following fulfilment or waiver of any Permitted Regulatory Conditions provided such date is
not later than the Long Stop Date; or
| | ----- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 6.1.4 | at such other location and at such other time or on such other date as may be agreed in writing between the Investor and the Seller.
| | ----- | ------------------------------------------------------------------------------------------------------------------------------------



|6.2 | Further Closing events
|--- | ----------------------



| | 6.2.1 | On Further Closing:
| | ----- | -------------------



| | (i) | the Seller shall deliver or take (or cause to be delivered or taken) the documents and actions listed in Part A of Schedule 1; and
| | --- | ----------------------------------------------------------------------------------------------------------------------------------



| | (ii) | the Investor shall deliver or take (or cause to be delivered or taken) the documents and actions listed in Part B of Schedule 1.
| | ---- | --------------------------------------------------------------------------------------------------------------------------------



| | 6.2.2 | The Seller may waive some or all of the obligations of the Investor as set out in Part B of Schedule 1 and the Investor may waive some or all
of the obligations of the Seller as set out in Part A of Schedule 1.
| | ----- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|6.3 | Payment on Further Closing
|--- | --------------------------

At Further Closing, the Investor shall pay the Further Acquisition Payment in cleared funds to the Seller.



|6.4 | [***]
|--- | -----



|6.5 | Breach of Further Closing obligations
|--- | -------------------------------------

If a party fails to comply with any material obligation in Clauses 6.2, 6.3, 6.4 or Schedule 1, the Investor, in the case
of non-compliance by the Seller, or the Seller, in the case of non-compliance by the Investor, shall be entitled (without prejudice to the right to claim damages or
other compensation) by written notice to the other served on the Further Closing Date:



| | 6.5.1 | provided that Further Closing has been deferred under Clause 6.5.3 by the party serving notice hereunder on not less than two occasions, to
terminate this Agreement (other than the Surviving Clauses) without liability on their part;
| | ----- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 6.5.2 | to effect Further Closing so far as practicable having regard to the defaults which have occurred; or
| | ----- | -----------------------------------------------------------------------------------------------------



| | 6.5.3 | to fix a new date for Further Closing in which case the provisions of Schedule 1 shall apply to Further Closing as so deferred.
| | ----- | -------------------------------------------------------------------------------------------------------------------------------





12



---

|7 | Warranties
|- | ----------



|7.1 | The Sellers Warranties
|--- | -----------------------

The Seller warrants to the Investor that:



| | 7.1.1 | the statements set out in Schedule 2 are true and accurate as of the date of this Agreement; and
| | ----- | ------------------------------------------------------------------------------------------------



| | 7.1.2 | the statements set out in Schedule 2 will be true and accurate at Further Closing as if they had been repeated at Further Closing.
| | ----- | ----------------------------------------------------------------------------------------------------------------------------------



|7.2 | The Investors warranties
|--- | -------------------------

The Investor warrants to the Seller that:



| | 7.2.1 | the statements set out in Schedule 3 are true and accurate as of the date of this Agreement; and
| | ----- | ------------------------------------------------------------------------------------------------



| | 7.2.2 | the statements set out in Schedule 3 will be true and accurate at Further Closing as if they had been repeated at Further Closing.
| | ----- | ----------------------------------------------------------------------------------------------------------------------------------



|8 | Confidentiality
|- | ---------------



|8.1 | Announcements
|--- | -------------

Until the earlier of Further Closing and the Long Stop Date, no announcement, communication or circular in connection with the existence or the subject matter of this Agreement shall be made or issued by
or on behalf of any member of the Sellers Group or any member of the Investors Group or any GasD Group Company without the prior written approval of the Seller and the Investor. This shall not affect any announcement, communication, or
circular required by law or any governmental or regulatory body or the rules of any stock exchange on which the shares of either party or its holding company are listed, but the party with an obligation to make an announcement or communication or
issue a circular (or whose holding company has such an obligation) shall consult with the other party (or shall procure that its holding company consults with the other party) insofar as is reasonably practicable before complying with such an
obligation.



|8.2 | Confidentiality
|--- | ---------------



| | 8.2.1 | Subject to Clauses 8.1 and 8.2.2, each of the Seller and the Investor shall treat as strictly confidential and not disclose or use any
confidential information received or obtained as a result of entering into this Agreement (or any agreement entered into pursuant to this Agreement) which relates to:
| | ----- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (i) | the existence and the provisions of this Agreement and of any agreement entered into pursuant to this Agreement; or
| | --- | -------------------------------------------------------------------------------------------------------------------



| | (ii) | the negotiations relating to this Agreement (and any such other agreements);
| | ---- | ----------------------------------------------------------------------------



| | (iii) | (in the case of the Seller) any information relating to the business, financial or other affairs (including future plans and targets) of the
Investors Group; or
| | ----- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------





13



---

| | (iv) | (in the case of the Investor) any information relating to the business, financial or other affairs (including future plans and targets) of the
Sellers Group as constituted after Further Closing.
| | ---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 8.2.2 | Clause 8.2.1 shall not prohibit disclosure or use of any information if and to the extent:
| | ----- | ------------------------------------------------------------------------------------------



| | (i) | the disclosure or use is required by the Laws, any governmental or regulatory body or any stock exchange on which the shares of a party or its
holding company are listed (including where this is required as part of any actual or potential offering, placing and/or sale of securities of any member of the Sellers Group or the Investors Group);
| | --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (ii) | the disclosure or use is required to vest the full benefit of this Agreement in the Seller or the Investor;
| | ---- | -----------------------------------------------------------------------------------------------------------



| | (iii) | the disclosure or use is required for the purpose of any judicial proceedings arising out of this Agreement or any other Transaction Document;
| | ----- | ----------------------------------------------------------------------------------------------------------------------------------------------



| | (iv) | the disclosure is made to a Tax Authority in connection with the Tax affairs of the disclosing party or any other entity with which it is grouped
for Tax purposes;
| | ---- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (v) | the disclosure is made to a party to whom assignment is permitted under Clause 9.3.2 on terms that such assignee undertakes to comply with the
provisions of Clause 8.2.1 in respect of such information as if it were a party to the Agreement;
| | --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (vi) | the disclosure is made to professional advisers of either party on terms that such professional advisers undertake to comply with the provisions of
Clause 8.2.1 in respect of such information as if they were a party to this Agreement;
| | ---- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (vii) | the information is or becomes publicly available (other than by breach of a Confidentiality Agreement, the Acquisition Agreement, the
Shareholders Agreement or of this Agreement);
| | ----- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (viii) | the other party has given prior written approval to the disclosure or use;
| | ------ | --------------------------------------------------------------------------



| | (ix) | permitted by the Shareholders Agreement; or
| | ---- | --------------------------------------------



| | (x) | the information is independently developed after Further Closing,
| | --- | -----------------------------------------------------------------

provided that prior to disclosure or use of any information pursuant to Clause 8.2.2(i), (ii) or (iii), the party
concerned shall, where not prohibited by law, consult with the other party insofar as is reasonably practicable before making such disclosure or use.



|9 | Other Provisions
|- | ----------------



|9.1 | Further assurances
|--- | ------------------

Each of the parties shall, and shall use reasonable endeavours to procure that any necessary third party shall, from time to time execute such documents and perform such acts and things as either of them
may reasonably require to give the other the full benefit of this Agreement.





14



---

|9.2 | Whole agreement
|--- | ---------------



| | 9.2.1 | This Agreement, the Acquisition Agreement and the Shareholders Agreement contain the whole agreement between the parties relating to
the subject matter of this Agreement to the exclusion of any terms implied by law which may be excluded by contract and supersede any previous written or oral agreement between the Seller and the Investor in relation to the Transaction.
| | ----- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 9.2.2 | Each party agrees and acknowledges that, in entering into this Agreement, it is not relying on any representation, warranty or undertaking
not expressly incorporated into it.
| | ----- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 9.2.3 | Each party agrees and acknowledges that its only right and remedy in relation to any representation, warranty or undertaking made or given in
connection with this Agreement shall be for breach of the terms of this Agreement and each of the Seller and the Investor waives all other rights and remedies (including those in tort or arising under statute) in relation to any such representation,
warranty or undertaking.
| | ----- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 9.2.4 | No party shall be entitled to rescind or terminate this Agreement (whether before or after Further Closing) for breach of any representation,
warranty or undertaking set out in this Agreement, other than pursuant to any such rights which arise in respect of fraud.
| | ----- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 9.2.5 | Nothing in this Clause 9.2 excludes or limits any liability for fraud.
| | ----- | ----------------------------------------------------------------------



|9.3 | Assignment
|--- | ----------



| | 9.3.1 | Except as permitted by Clause 9.3.2 or Clause 9.3.3, no party may without the prior written consent of the other party assign, grant any
security interest over, hold on trust or otherwise transfer the benefit of the whole or any part of this Agreement.
| | ----- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 9.3.2 | The Seller may without the consent of the Investor assign to a member of the Sellers Group the benefit of the whole or any part of this
Agreement provided that:
| | ----- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (i) | if the assignee ceases to be a member of the Sellers Group, it shall, before ceasing to be so, assign the benefit so far as assigned to it
back to that party or assign the benefit to another member of the Sellers Group, as the case may be; and
| | --- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (ii) | the assignee shall not be entitled to receive under this Agreement any greater amount than that to which the Seller would have been entitled.
| | ---- | ---------------------------------------------------------------------------------------------------------------------------------------------



| | 9.3.3 | The Investor may at any time assign by way of security or grant any charge or other security interest over, all or any part of the benefit
of, or its rights or benefits under, this Agreement and/or any other Transaction Document to any person who has agreed at any time to provide finance to the Investor or any other member of the GasD Group and/or to any agent or trustee of such
person, provided that, where the Investor or any member of the GasD Group assigns the benefit of, or grants any charge or other security interest over, this Agreement and/or any other Transaction Document in whole or in part to any other person, the
liabilities of the Seller under this Agreement, or any other Transaction Document so assigned, to the Investor or the relevant member of the GasD Group and the assignee(s) (taken together) shall be no greater than such liabilities would have been
had the assignment not occurred.
| | ----- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





15



---

|9.4 | Third party rights
|--- | ------------------

A person who is not a party to this Agreement has no right under the Contracts (Rights of Third Parties) Act 1999 to enforce any term of, or enjoy any benefit under, this Agreement.



|9.5 | Variation
|--- | ---------

No variation of this Agreement shall be effective unless in writing and signed by or on behalf of each of the parties.



|9.6 | Method of payment and set off
|--- | -----------------------------



| | 9.6.1 | Any payments pursuant to this Agreement shall be made in full, without any set off, counterclaim, restriction or condition and without any
deduction or withholding (save as may be required by law or as otherwise agreed).
| | ----- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 9.6.2 | Any payments pursuant to this Agreement shall be effected by crediting for same day value the account specified by the Seller or the Investor
(as the case may be) on behalf of the party entitled to the payment (reasonably in advance and in sufficient detail to enable payment by telegraphic or other electronic means to be effected) on or before the due date for payment.
| | ----- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 9.6.3 | Payment of a sum in accordance with this Clause 9.6 shall constitute a payment in full of the sum payable and shall be a good discharge to
the payer (and those on whose behalf such payment is made) of the payers obligation to make such payment and the payer (and those on whose behalf such payment is made) shall not be obliged to see to the application of the payment as between
those on whose behalf the payment is received.
| | ----- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|9.7 | Costs
|--- | -----



| | 9.7.1 | The Seller shall bear all costs incurred by it and the Sellers Group in connection with the preparation, negotiation and entry into of
this Agreement and the sale of the Further Sale Assets.
| | ----- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 9.7.2 | The Investor shall bear all such costs incurred by it in connection with the preparation, negotiation and entry into of this Agreement and
the purchase of the Further Sale Assets.
| | ----- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|9.8 | Stamp Duty and Transfer Taxes
|--- | -----------------------------

The Investor shall bear the cost of all stamp duty, SDRT and all registration and transfer taxes and duties or their equivalents (and, in each case, any interest thereon or penalty in respect thereof) in
all jurisdictions where such fees, taxes and duties are payable as a result of the sale and purchase of the Further Sale Assets. The Investor shall be responsible for arranging the payment of such stamp duty, SDRT and all other such fees, taxes and
duties, including fulfilling any administrative or reporting obligation imposed by the jurisdiction in question in connection with such payment. The Investor shall indemnify the Seller or any other member of the Sellers Group against any
Losses suffered by the Seller or member of the Sellers Group as a result of the Investor failing to comply with its obligations under this Clause 9.8.





16



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FOIA confidential treatment requested: [***] indicates that certain information
contained herein has been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to such omitted portions.





|9.9 | Interest
|--- | --------

If a party defaults in the payment when due of any sum payable under this Agreement, its liability shall be increased to include interest on such sum from the date when such payment is due until the date
of actual payment (after as well as before judgment) at a rate per annum of 2 per cent. above LIBOR. Such interest shall accrue from day to day.



|9.10 | VAT
|---- | ---



| | 9.10.1 | Where under the terms of this Agreement one party is liable to indemnify or reimburse another party in respect of any costs, charges or
expenses, the payment shall include an amount equal to any VAT thereon not otherwise recoverable by the other party or the representative member of any VAT group of which it forms part, subject to that person or representative member using
reasonable endeavours to recover such amount of VAT as may be practicable.
| | ------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 9.10.2 | If any payment under this Agreement constitutes the consideration for a taxable supply for VAT purposes, then: (i) the supplier shall
provide to the payer a valid VAT invoice; and (ii) except where the reverse charge procedure applies, and subject to the provision of a valid VAT invoice in accordance with (i), in addition to that payment the payer shall pay any VAT due.
| | ------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|9.11 | Notices
|---- | -------



| | 9.11.1 | Any notice or other communication in connection with this Agreement (each, a Notice) shall be:
| | ------ | ------------------------------------------------------------------------------------------------





| | (i) | in writing; and
| | --- | ---------------



| | (ii) | delivered by hand, email, recorded or special delivery or courier.
| | ---- | ------------------------------------------------------------------



| | 9.11.2 | A Notice to the Seller shall be sent to the following address, or such other person or address as the Seller may notify to the Investor from
time to time:
| | ------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------

NATIONAL GRID HOLDINGS ONE PLC

Registered office of National Grid Holdings One plc from time to time

Email: [***]

Attention: Group General Counsel and Company Secretary

With a
copy by email to:

Email: [***]



| | 9.11.3 | A Notice to the Investor shall be sent to the following address, or such other person or address as the Investor may notify to the Seller
from time to time:
| | ------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------

QUADGAS INVESTMENTS BIDCO LIMITED

18 St Swithins Lane London EC4N 8AD

Attention: The Directors

With a copy by email to:

Email: [***]





17



---

| | 9.11.4 | A Notice shall be effective upon receipt and shall be deemed to have been received:
| | ------ | -----------------------------------------------------------------------------------



| | (i) | at 9.00 a.m. on the second Business Day following the date of posting, in the case of recorded delivery;
| | --- | --------------------------------------------------------------------------------------------------------



| | (ii) | at the time of delivery, if delivered by hand or courier; or
| | ---- | ------------------------------------------------------------



| | (iii) | at the time of sending, if sent by email, provided that receipt shall not occur if the sender receives an automated message indicating that the
email has not been delivered to the recipient.
| | ----- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|9.12 | Invalidity
|---- | ----------



| | 9.12.1 | If any provision in this Agreement shall be held to be illegal, invalid or unenforceable, in whole or in part, the provision shall apply with
whatever deletion or modification is necessary so that the provision is legal, valid and enforceable and gives effect to the commercial intention of the parties.
| | ------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 9.12.2 | To the extent it is not possible to delete or modify the provision, in whole or in part, under Clause 9.12.1, then such provision or part of
it shall, to the extent that it is illegal, invalid or unenforceable, be deemed not to form part of this Agreement and the legality, validity and enforceability of the remainder of this Agreement shall, subject to any deletion or modification made
under Clause 9.12.1, not be affected.
| | ------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|9.13 | Counterparts
|---- | ------------

This Agreement may be entered into in any number of counterparts, all of which taken together shall constitute one and the same instrument. The parties may enter into this Agreement by executing any such
counterpart.



|9.14 | Governing law and submission to jurisdiction
|---- | --------------------------------------------



| | 9.14.1 | This Agreement and the documents to be entered into pursuant to it, save as expressly referred to therein, and any non-contractual obligations arising out of or in connection with the Agreement and such documents shall be governed by English law.
| | ------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 9.14.2 | Each of the Seller and the Investor irrevocably agrees that the courts of England are to have exclusive jurisdiction to settle any dispute
which may arise out of or in connection with this Agreement and the documents to be entered into pursuant to it and that accordingly any proceedings arising out of or in connection with this Agreement and the documents to be entered into pursuant to
it shall be brought in such courts. Each of the Seller and the Investor irrevocably submits to the jurisdiction of such courts and waives any objection to proceedings in any such court on the ground of venue or on the ground that proceedings have
been brought in an inconvenient forum.
| | ------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|9.15 | Compliance with anti-bribery and anti-corruption laws
|---- | -----------------------------------------------------



| | 9.15.1 | Each party hereby warrants, represents and undertakes to each other party hereto that, in relation to the negotiation, conclusion and
performance of this Agreement:
| | ------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------





18



---

| | (i) | neither it nor any of its Affiliates, or any of its or their respective directors, officers, employees and authorized agents, has conducted any act
in violation of applicable anti-bribery laws; and
| | --- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (ii) | it shall promptly notify each other party if it becomes aware of or has specific suspicions that any corruption or bribery occurred.
| | ---- | ------------------------------------------------------------------------------------------------------------------------------------





19



---

In witness whereof this Agreement has been duly executed and delivered as a
deed on the date first stated above.



|                                                                                     |  |      |  |                       
|------------------------------------------------------------------------------------ |  | ---- |  | ----------------------
|SIGNED as a DEED by 
Christopher Waters on behalf of NATIONAL GRID HOLDINGS ONE PLC: |  | LOGO |  | /s/ Christopher Waters

In the presence of:



|                                   
|-----------------------------------
|/s/ Gabrielle Smith                
|Name: Gabrielle Smith              
|                                   
|Address: 1-3 Strand
London WC2N 5EH
|                                   
|Occupation: Solicitor              



|                                                               |  |      |  |                   
|-------------------------------------------------------------- |  | ---- |  | ------------------
|SIGNED as a DEED by QUADGAS INVESTMENTS
BIDCO LIMITEDacting by |  |      |  |                   
|                                                               |  |     
|Martin Bradley
a Director                                      |  | LOGO |  | /s/ Martin Bradley
|                                                               |  |     
|Peter Hofbauer
a Director                                      |  | LOGO |  | /s/ Peter Hofbauer







Signature page to Further Acquisition Agreement



---

Schedule 1

Further Closing Obligations

(Clause 6.2)

Part A: Sellers Obligations

On Further Closing, the Seller shall deliver or make available to the Investor the following:



|(i) | duly executed instrument(s) for the transfer of the Further Shares;
|--- | -------------------------------------------------------------------



|(ii) | duly executed instrument(s) for the assignment of the Further Debt;
|---- | -------------------------------------------------------------------



|(iii) | a power of attorney in such form and in favour of such person as the Investor may nominate to enable the Investor to exercise all rights of
ownership over the Further Shares, including without limitation, voting rights;
|----- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|(iv) | the share certificates representing the Further Shares; and
|---- | -----------------------------------------------------------



|(v) | evidence that the Seller is authorised to execute this Agreement and each of the Transaction Documents to be executed by the Seller.
|--- | ------------------------------------------------------------------------------------------------------------------------------------

Part B: Investors Obligations

On Further Closing, the Investor shall deliver or make available to the Seller evidence that the Investor is authorised to execute this Agreement and any other Transaction Document due to be executed by
the Investor.





21



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Schedule 2

Sellers Warranties

(Clause 7.1)



|1 | Further Shares
|- | --------------



|1.1 | The Seller is the sole legal and beneficial owner of the Further Shares and has the right to exercise all voting and other rights over the
Further Shares.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------



|1.2 | The Further Shares have been properly and validly issued and allotted, are fully paid or credited as fully paid and free from all
Encumbrances.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------



|1.3 | No person has the right (whether exercisable now or in the future and whether contingent or not) to call for the allotment, conversion,
issue, registration, sale or transfer or repayment of any share or loan capital or any other security giving rise to a right over the Further Shares under any option, agreement or other arrangement (including conversion rights and rights of pre-emption) other than pursuant to this Agreement or the Shareholders Agreement.
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|2 | Further Debt
|- | ------------



|2.1 | The Seller is the sole legal and beneficial owner of the Further Debt and has the right to receive all amounts of outstanding principal and
accrued but unpaid interest in respect of the Further Debt from time to time.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|2.2 | The Further Debt is free from all Encumbrances.
|--- | -----------------------------------------------



|3 | Incorporation
|- | -------------

The Seller is validly existing and is a company duly incorporated under the laws of England and Wales.



|4 | Authority to enter into Agreement
|- | ---------------------------------



|4.1 | The Seller has the legal right and full power and authority to enter into and perform this Agreement.
|--- | -----------------------------------------------------------------------------------------------------



|4.2 | This Agreement will, when executed, constitute valid and binding obligations on the Seller in accordance with its terms.
|--- | ------------------------------------------------------------------------------------------------------------------------



|5 | Authorisation
|- | -------------

The Seller has taken or will have taken by Further Closing all corporate action required by it to authorise it to enter into and perform this Agreement.





22



---

Schedule 3

Warranties given by the Investor

(Clause 7.2)



|1 | Authority and Capacity
|- | ----------------------



|1.1 | Incorporation
|--- | -------------

The Investor is validly existing and is a company duly incorporated under the laws of England and Wales.



|1.2 | Authority to enter into Agreement
|--- | ---------------------------------



| | 1.2.1 | The Investor has the legal right and full power and authority to enter into and perform this Agreement.
| | ----- | -------------------------------------------------------------------------------------------------------



| | 1.2.2 | This Agreement will, when executed, constitute valid and binding obligations on the Investor in accordance with its respective terms.
| | ----- | -------------------------------------------------------------------------------------------------------------------------------------



|1.3 | Authorisation
|--- | -------------

The Investor has taken or will have taken by Further Closing all corporate action required by it to authorise it to enter into and perform this Agreement.



|2 | Insolvency etc.
|- | ---------------



|2.1 | The Investor is not insolvent or unable to pay its debts as they fall due.
|--- | --------------------------------------------------------------------------



|2.2 | There are no proceedings in relation to any compromise or arrangement with creditors or any winding up, bankruptcy or other insolvency
proceedings concerning any member of the Investors Group which may adversely affect the ability of the Investor to comply with this Agreement and no events have occurred which, under applicable laws, would justify such proceedings.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|2.3 | So far as the Investor is aware, no steps have been taken to enforce any security over any assets of any member of the Investors Group
which may adversely affect the ability of the Investor to comply with this Agreement and no event has occurred to give the right to enforce such security.
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





23



---

Schedule 4

Limits and Claims

Part A  Sellers Warranties



|1 | Limitation of Liability
|- | -----------------------



|1.1 | Time limitation for breach of the Sellers Warranties
|--- | -----------------------------------------------------

The Seller shall not be liable for a breach of any of the Sellers Warranties unless the Investor has notified the
Seller of the claim specifying the matters set out in paragraph 2.1 within 12 months following the Further Closing Date.



|1.2 | Maximum liability
|--- | -----------------

The aggregate liability of the Seller for breach of any of the Sellers Warranties shall not exceed the Further Acquisition Payment.



|1.3 | No double recovery and no double counting
|--- | -----------------------------------------

No party may recover for breach of or under this Agreement or otherwise more than once in respect of the same Losses
suffered or amount for which the party is otherwise entitled to claim (or part of such Losses or amount), and no amount (including any Relief) (or part of any amount) shall be taken into account, set off or credited more than once for breach of or
under this Agreement or otherwise, with the intent that there will be no double counting for breach of or under this Agreement or otherwise.



|1.4 | Mitigation of Losses
|--- | --------------------

The Investor shall procure that all reasonable steps are taken and all reasonable assistance is given to avoid or mitigate any Losses which in the absence of mitigation might give rise to a liability for
any claim for breach of the Sellers Warranties.



|1.5 | Fraud
|--- | -----

None of the limitations contained in this paragraph 1 shall apply to any claim for breach of the Sellers Warranties to the extent it arises or is increased as a result of fraud by the Seller.



|2 | Claims
|- | ------



|2.1 | Notification of potential Claims
|--- | --------------------------------

If the Investor becomes aware of any fact, matter or circumstance that may give rise to a claim for breach of any of the Sellers Warranties then the Investor shall as soon as reasonably practicable
give a notice in writing to the Seller setting out such information as is available to the Investor concerning the potential claim.



|2.2 | Notification of Claims
|--- | ----------------------

Notice of any claim arising from a breach of any of the Sellers Warranties shall be given by the Investor to the Seller within the time limit specified in paragraph 1.1.





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|2.3 | Commencement of Proceedings
|--- | ---------------------------

Any claim notified pursuant to paragraph 2.2 shall (if it has not been previously satisfied, settled or withdrawn) be deemed to be irrevocably withdrawn six months after the notice is given pursuant to
paragraph 2.2, unless at the relevant time legal proceedings in respect of the claim have been commenced by being both issued and served.

Part B  Claims Only

For the avoidance of doubt, this Part B of
Schedule 4 does not apply to claims for breach of any of the Sellers Warranties.



|1 | Limitation of Liability
|- | -----------------------



|1.1 | Time limitation for Claims
|--- | --------------------------

The Seller shall not be liable for any Claim unless a notice of the Claim is given by the Investor to the Seller within 24 months following the Further Closing Date.



|1.2 | Minimum Claims
|--- | --------------



| | 1.2.1 | The Seller shall not be liable for any individual Claim (or a series of Claims arising from substantially identical facts or circumstances)
where the liability agreed or determined for any such Claim or series of Claims does not exceed £4,600,000.
| | ----- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 1.2.2 | Where the liability agreed or determined in respect of any Claim or series of Claims (as the case may be) exceeds the amount referred to in
paragraph 1.2.1, the Seller shall be liable for the full amount of all such Claims and not just the excess.
| | ----- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|1.3 | Aggregate minimum Claims
|--- | ------------------------



| | 1.3.1 | The Seller shall not be liable for any Claim unless the aggregate amount of all Claims for which the Seller would otherwise be liable exceeds
an amount equal to 2 per cent. of the Further Acquisition Payment.
| | ----- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 1.3.2 | Where the liability agreed or determined in respect of all Claims referred to in paragraph 1.3.1 exceeds the amount referred to in paragraph
1.3.1, the Seller shall be liable for the full amount of all such Claims and not just the excess.
| | ----- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|1.4 | Maximum liability
|--- | -----------------

The aggregate liability of the Seller for all Claims shall not exceed an amount equal to 10 per cent. of the Further Acquisition Payment.



|1.5 | Contingent liabilities
|--- | ----------------------

The Seller shall not be liable for any Claim in respect of any liability which is contingent unless and until such contingent liability becomes an actual liability and is due and payable.



|1.6 | Losses
|--- | ------

The Seller shall not be liable for any Claim in respect of any loss of profit, loss of goodwill or any indirect or consequential losses.





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|1.7 | Matters arising subsequent to this Agreement
|--- | --------------------------------------------

The Seller shall not be liable for any Claim to the extent that the Losses occasioned by the Claim have arisen as a result
of:



| | 1.7.1 | Agreed matters
| | ----- | --------------

any matter or thing done or omitted to be done pursuant to and in compliance with this Agreement or any other Transaction Document or otherwise at the request in writing or with the approval in writing of
the Investor;



| | 1.7.2 | Acts of the Investor
| | ----- | --------------------

any act, omission or transaction of the Investor or any member of the Investors Group or any of the GasD Group Companies, or their respective directors, officers, employees or agents or successors
in title, after Further Closing:



| | (i) | outside the ordinary course of business;or
| | --- | ------------------------------------------



| | (ii) | otherwise than in order to comply with law, pursuant to a legally binding commitment to which the GasD Group is subject on or before Further Closing
or in accordance with or approved under the Shareholders Agreement;
| | ---- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 1.7.3 | Changes in legislation, regulation or practice
| | ----- | ----------------------------------------------



| | (i) | the passing of, or any change in, after the date of this Agreement, any law, rule, regulation or administrative practice of any government,
governmental department, agency or regulatory body, including (without prejudice to the generality of the foregoing) any increase in the rates of Taxation or any imposition of Taxation or any withdrawal of relief from Taxation not actually (or
prospectively) in effect at the date of this Agreement;
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (ii) | any change after the date of this Agreement of any generally accepted interpretation or application of any legislation; or
| | ---- | --------------------------------------------------------------------------------------------------------------------------



| | (iii) | any change after the date of this Agreement of any generally accepted accounting principles, procedure or practice; or
| | ----- | ----------------------------------------------------------------------------------------------------------------------



| | 1.7.4 | Accounting and Taxation policies
| | ----- | --------------------------------

any change in accounting or Taxation policy, bases or practice of the Investor, the Investors Group or the GasD Group Companies introduced or having effect after the date of this Agreement.



|1.8 | Insurance
|--- | ---------

The Seller shall not be liable for any Claim to the extent that the Losses in respect of which the Claim is made: (i) are covered by a policy of insurance; or (ii) would have been covered if the
policies of insurance for the benefit of the GasD Group Companies in force at the date of Further Closing had been maintained after Further Closing on no less favourable terms.



|1.9 | Investors, GasD MidCos and GasD HoldCos right to recover
|--- | -----------------------------------------------------------



| | 1.9.1 | Recovery for Actual Liabilities
| | ----- | -------------------------------





26



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The Seller shall not be liable to pay an amount in discharge of any Claim
unless and until the liability for which the Claim is made has become due and payable.



| | 1.9.2 | Prior to recovery from the Seller etc.
| | ----- | --------------------------------------

If, before the Seller pays an amount in discharge of any Claim, the Investor, any member of the Investors Group or
any GasD Group Company recovers or is entitled to recover (whether by payment, discount, credit, relief, insurance or otherwise) from a third party a sum which indemnifies or compensates the Investor, any member of the Investors Group or any
GasD Group Company (in whole or in part) for the loss or liability which is the subject matter of the Claim, the Investor shall procure that, before steps are taken to enforce a Claim against the Seller following notification under paragraph 2.2 or
under any other Transaction Document, all reasonable steps are taken to enforce the recovery against the third party and any actual recovery (less any Taxation suffered thereon and any reasonable costs incurred in obtaining such recovery) shall
reduce or satisfy, as the case may be, such Claim to the extent of such recovery.



| | 1.9.3 | Following Recovery from the Seller etc.
| | ----- | ---------------------------------------



| | (iii) | If the Seller has paid an amount in discharge of any Claim and subsequently the Investor, any member of the Investors Group or any GasD Group
Company is entitled to recover (whether by payment, discount, credit, relief, insurance or otherwise) from a third party a sum which indemnifies or compensates the Investor, any member of the Investors Group or any GasD Group Company (in whole
or in part) for the loss or liability which is the subject matter of the Claim, the Investor shall procure that all steps are taken as the Seller may reasonably require to enforce such recovery and shall pay to the Seller as soon as practicable
after receipt an amount equal to: (i) any sum recovered from the third party less any Taxation suffered thereon and less any costs and expenses incurred in obtaining such recovery; or, if less, (ii) the amount previously paid by the Seller
to the Investor; and
| | ----- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (iv) | Any payment made by the Investor to the Seller under this paragraph 1.9.3 shall, to the extent possible, be made by way of further adjustment of the
Further Share Consideration and the provisions of Clause 3.3 shall apply mutatis mutandis.
| | ---- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|1.10 | No double recovery and no double counting
|---- | -----------------------------------------

No party may recover for breach of or under this Agreement or otherwise more than once in respect of the same Losses
suffered or amount for which the party is otherwise entitled to claim (or part of such Losses or amount), and no amount (including any Relief) (or part of any amount) shall be taken into account, set off or credited more than once for breach of or
under this Agreement or otherwise, with the intent that there will be no double counting for breach of or under this Agreement or otherwise.



|1.11 | Mitigation of Losses
|---- | --------------------

The Investor shall procure that all reasonable steps are taken and all reasonable assistance is given to avoid or mitigate any Losses which in the absence of mitigation might give rise to a liability for
any claim for breach of or under this Agreement.





27



---

|1.12 | Fraud
|---- | -----

None of the limitations contained in this Part B shall apply to any claim for breach of or under this Agreement to the extent it arises or is increased as a result of fraud by the Seller.



|2 | Claims
|- | ------



|2.1 | Notification of potential Claims
|--- | --------------------------------

If the Investor becomes aware of any fact, matter or circumstance that may give rise to a Claim or a Cornerstone Claim then the Investor shall as soon as reasonably practicable give a notice in writing to
the Seller setting out such information as is available to the Investor concerning the potential Claim or Cornerstone Claim.



|2.2 | Notification of Claims
|--- | ----------------------

Notice of any Claim shall be given by the Investor to the Seller within the time limits specified in paragraph 1.1 of this Part B.



|2.3 | Commencement of proceedings
|--- | ---------------------------

Any Claim notified pursuant to paragraph 2.1 or 2.2 shall (if it has not been previously satisfied, settled or withdrawn) be deemed to be irrevocably withdrawn six months after:



| | 2.3.1 | the notice is given pursuant to paragraph 2.1 or 2.2 (as the case may be); or
| | ----- | -----------------------------------------------------------------------------



| | 2.3.2 | where paragraph 1.5 applies, a contingent liability becomes an actual liability,
| | ----- | --------------------------------------------------------------------------------

unless at the relevant time legal proceedings in respect of the Claim have been commenced by being both issued and served.



|2.4 | Investigation by the Seller
|--- | ---------------------------

In connection with any matter or circumstance that may give rise to a Claim:



| | 2.4.1 | the Investor on the one hand and the Seller on the other hand shall allow, and shall procure that the relevant GasD Group Company allows, the
other party and its financial, accounting or legal advisers to investigate the matter or circumstance alleged to give rise to the Claim and whether and to what extent any amount is payable in respect of such Claim; and
| | ----- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 2.4.2 | the Investor on the one hand shall disclose to the Seller on the other hand all material of which the Investor is aware which relates to the
Claim and shall procure that any other GasD Group Companies shall give, subject to their being paid all reasonable costs and expenses, all such information and assistance, including access to premises and personnel, making such personnel available
for factual interviews, preparation for testimony, giving evidence, producing affidavits and other similar activities, and the right to examine and copy or photograph any assets, accounts, documents and records, as the Seller or its financial,
accounting or legal advisers may reasonably request subject to the Seller agreeing in such form as the Investor may reasonably require to keep all such information confidential and to use it only for the purpose of investigating and defending the
Claim in question.
| | ----- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





28



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FOIA confidential treatment requested: [***] indicates that certain information
contained herein has been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to such omitted portions.



Schedule 5

[***]





29



---

FOIA confidential treatment requested: [***] indicates that certain information
contained herein has been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to such omitted portions.



Schedule 6

Sell Notice



|To: | Quadgas Investments Bidco Limited
|--- | ---------------------------------

18 St Swithins Lane

London EC4N 8AD

United Kingdom

Attention: The Directors

With a copy to: [***]

[Date] 2018

Dear
Sirs,

We, National Grid Holdings One plc, refer to the Further Acquisition Agreement dated [] 2017 and made between
yourselves, and ourselves (the Agreement) and to the right granted to us pursuant to Clause 4.1 of the Agreement to require you to purchase the Further Sale Assets. Defined terms in this notice shall have the meanings set out in
the Agreement.

This is the Sell Notice referred to in the Agreement.



|1 | Further Sale Assets
|- | -------------------

We hereby give notice under and pursuant to Clause 4.1 of the Agreement that we wish to sell to you the Further Sale Assets. The Further Sale Assets comprise the following:



| | (i) | Further Shares: [Insert number]
| | --- | -------------------------------



| | (ii) | Further Debt: [Insert amount]
| | ---- | -----------------------------



|2 | Permitted Regulatory Conditions
|- | -------------------------------

[Insert details of any Permitted Regulatory Conditions]



|3 | Further Closing Date
|- | --------------------

The Further Closing Date shall be [] 2019.

Yours faithfully,





For and on behalf of

National Grid Holdings One plc





30



---

FOIA confidential treatment requested: [***] indicates that certain information
contained herein has been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to such omitted portions.



Schedule 7

Purchase Notice



|To: | National Grid Holdings One plc
|--- | ------------------------------

1-3 Strand

London WC2N
5EH

United Kingdom

Attention: Group General Counsel and Company Secretary

Email:
[***]

With a copy by email to:

Email: [***]

[Date] 2019

Dear Sirs,

We, Quadgas Investments Bidco Limited, refer to the Further Acquisition Agreement dated [] 2017 and made between yourselves, and
ourselves (the Agreement) and to the right granted to us pursuant to Clause 4.2 of the Agreement to require you to transfer to us the Further Sale Assets. Defined terms in this notice shall have the meanings set out in the
Agreement.

This is the Purchase Notice referred to in the Agreement.



|1 | Further Sale Assets
|- | -------------------

We hereby give notice under and pursuant to Clause 4.2 of the Agreement that we wish to acquire the Further Sale Assets from you. The Further Sale Assets comprise the following:



| | (i) | Further Shares: [Insert number]
| | --- | -------------------------------



| | (ii) | Further Debt: [Insert amount]
| | ---- | -----------------------------



|2 | Permitted Regulatory Conditions
|- | -------------------------------

[Insert details of any Permitted Regulatory Conditions]



|3 | Further Closing Date
|- | --------------------

The Further Closing Date shall be [] 2019.

Yours faithfully,





For and on behalf of

Quadgas Investments Bidco Limited





31