Document:

EXHIBIT 8
To:      Amerada Hess Corporation plc ("Amerada Hess")

and      Goldman Sachs International ("Goldman Sachs")

                                                                 6 November 2000

Dear Sirs,

I  understand  that  Amerada  Hess  intends to make an offer to acquire  all the
issued ordinary share capital of Linda plc ("Linda")  substantially on the terms
of the  attached  draft press  announcement.  This letter sets out the terms and
conditions  on which I will accept the Offer (as defined in  paragraph 7 of this
undertaking) when it is made.

Shareholdings
1.       I represent and warrant to Amerada Hess that:

(a)      I am the  registered  holder  and  beneficial  owner of the  number  of
         ordinary  shares of 25p each in the capital of Linda shown in Part A of
         the  Schedule  (the "Linda  Shares")  and that I hold these free of any
         lien,  charge,  option,  equity or encumbrance  and free from any third
         party right or interest;

(b)      I am the beneficial owner (but not registered  holder) of the number of
         ordinary  shares of 25p each in the capital of Linda shown in Part B of
         the Schedule  (the  "Beneficial  Shares") and that I hold these free of
         any lien, charge, option, equity or encumbrance and free from any third
         party right or interest;

(c)      the information  set out in the Schedule  regarding the shares of Linda
         in which I am interested is complete and accurate;

(d)      the Schedule  contains  complete  and accurate  details of all options,
         warrants  and other  rights I may have to  subscribe  for,  purchase or
         otherwise acquire any securities of Linda; and

(e)      I have full  power and  authority  to enter into this  undertaking,  to
         perform the obligations  under it and to accept the Offer in respect of
         the Linda shares.

Dealings
2.       I undertake to Amerada Hess that before the Offer closes,  lapses or is
withdrawn, I shall not:

(a)      sell, transfer,  charge,  encumber,  grant any option over or otherwise
         dispose  of any  Linda  Shares  or any  Beneficial  Shares or any other
         shares or securities in Linda issued or unconditionally  allotted to me
         or otherwise  acquired by me before then ("Further Linda Shares") other
         than pursuant to my acceptance of the Offer;

(b)      accept any other offer in respect of the shares or securities  referred
         to in paragraph 2(a);

(c)      (other  than  pursuant  to the  Offer)  enter  into  any  agreement  or
         arrangement  or permit any agreement or  arrangement to be entered into
         or incur any obligation or permit any obligation to arise:

             (i)  to do any of the acts referred to in paragraphs 2(a) or 2(b);

            (ii)  in  relation  to, or  operating  by  reference  to,  the Linda
                  Shares, the Beneficial Shares or any Further Linda Shares; or

           (iii)  which, in relation to the Linda Shares,  the Beneficial Shares
                  or any Further Linda Shares, would or might restrict or impede
                  me accepting the Offer,

         and for the avoidance of doubt,  references in this  paragraph  2(c) to
         any  agreement,  arrangement  or  obligation  includes  any  agreement,
         arrangement or obligation  whether or not legally binding or subject to
         any  condition or which is to take effect if the Offer closes or lapses
         or if this  undertaking  ceases to be  binding or  following  any other
         event; or

(d)      save for the acquisition of any further shares in Linda on the exercise
         of options referred to in Part C of the Schedule, I shall not purchase,
         sell or otherwise  deal in any shares or other  securities  of Linda or
         Amerada  Hess  or  any  interest  therein  (including  any  derivatives
         referenced to such securities).

Undertaking to accept the Offer
3.       In  consideration  of Amerada Hess's agreement in paragraph 9.1 to make
the Offer, I undertake to Amerada Hess that:

(a)      I shall accept the Offer in respect of the Linda  Shares in  accordance
         with  the  procedure  for  acceptance  set out in the  formal  document
         containing  the Offer (the "Offer  Document") not later than seven days
         after Amerada Hess posts the Offer Document to Linda  shareholders  and
         shall  perform the  agreement to which that  acceptance  gives rise, in
         accordance with the relevant provisions of the Offer Document;

(b)      I shall take all action within my power to procure that the  registered
         holder of the  Beneficial  Securities  accepts the Offer in  accordance
         with the  relevant  provisions  of the Offer  Document and performs the
         agreement to which that  acceptance  gives rise, in accordance with the
         relevant provisions of the Offer Document;

(c)      I shall  accept  the Offer in respect of any  Further  Linda  Shares in
         accordance  with the  procedure  for  acceptance  set out in the  Offer
         Document not later than two days after the date I become the registered
         holder of the Further  Linda Shares and shall  perform the agreement to
         which that  acceptance  gives rise,  in  accordance  with the  relevant
         provisons of the Offer Document;

(d)      I shall take all action within my power to procure that the  registered
         holder  of any  further  ordinary  shares in Linda in which I acquire a
         beneficial  interest after the date of this  undertaking but of which I
         do not become  the  registered  holder  ("Further  Beneficial  Shares")
         accepts the offer and performs the  agreement to which that  acceptance
         gives rise in  accordance  with the  relevant  provisions  of the Offer
         Document.

(e)      I shall not withdraw any  acceptances  of the Offer and shall cause the
         registered   holder(s)  of  any  Beneficial   Shares  and  any  Further
         Beneficial Shares not to do so; and

(f)      pursuant to the Offer,  Amerada Hess will acquire the Linda Shares, the
         Beneficial  Shares and any  Further  Linda  Shares  from me free of any
         lien,  charge,  option,  equity or  encumbrance  and together  with all
         rights of any nature  attaching to those shares  including the right to
         all dividends declared or paid after the date of this undertaking.

Voting Rights
4.1 From the time Amerada Hess announces the Offer to the time the Offer becomes
wholly unconditional, lapses or is withdrawn:

(a)      I shall exercise the votes attaching to my Linda Shares and any Further
         Linda Shares on a Relevant  Resolution  (as defined in  paragraph  4.3)
         only in accordance with Amerada Hess's directions;

(b)      I shall  exercise  the  rights  attaching  to my Linda  Shares  and any
         Further  Linda  Shares to  requisition  or join in  requisitioning  any
         general or class  meeting of Linda for the  purposes of  considering  a
         Relevant  Resolution  and to require  Linda  pursuant  to  section  376
         Companies  Act  1985  to  give  notice  of  such a  resolution  only in
         accordance with Amerada Hess's directions;

(c)      I shall cause the registered holder(s) of any Beneficial Shares and any
         Further Beneficial Shares to comply with paragraphs 4.1(a) and 4.1(b).

4.2  For the  purpose  of  voting  or  causing  votes  to be cast on a  Relevant
Resolution,  I shall  execute  any  form  of  proxy  required  by  Amerada  Hess
appointing  any  person  nominated  by  Amerada  Hess to attend  and vote at the
relevant general meeting of Linda .

4.3      A "Relevant Resolution" means:

(a)      a resolution  (whether or not  amended)  proposed at a general or class
         meeting of Linda, or at an adjourned  meeting,  the passing of which is
         necessary to implement the Offer or which,  if passed,  might result in
         any condition of the Offer not being fulfilled or which might impede or
         frustrate the Offer in any way;

(b)      a  resolution  to  adjourn a general or class  meeting  of Linda  whose
         business  includes the  consideration  of a resolution  falling  within
         paragraph 4.3(a); and

(c)      a resolution to amend a resolution  falling within  paragraph 4.3(a) or
         paragraph 4.3(b).

Documentation
5.1      I consent to:

(a)      the  inclusion  of  references  to me and this  undertaking  in Amerada
         Hess's  announcement  of the Offer (the "Press  Announcement")  as they
         appear in the attached draft of the Press Announcement;

(b)      particulars  of this  undertaking  and my holdings of, and dealings in,
         relevant  securities  of Linda and Amerada  Hess being  included in the
         Offer Document and any other related or ancillary  document as required
         by the Code; and

(c)      this  undertaking  being available for inspection  until the end of the
         offer period (as defined in the Code).

5.2 I shall  promptly  give you all  information  and any  assistance as you may
reasonably require for the preparation of the Offer Document and all related and
ancillary  documents in order to comply with the  requirements  of the Code, the
Financial  Services  Authority and the London Stock Exchange and any other legal
or regulatory  requirement or body. I shall immediately notify you in writing of
any  material  change in the  accuracy or impact of any  information  previously
given to you.

Secrecy
6. I will keep secret the possibility, terms and conditions of the Offer and the
existence and terms of this undertaking until the Press Announcement is released
provided  that I may disclose the same to Linda and its advisers in which case I
will use reasonable  endeavours to ensure that they observe  secrecy in the same
terms.  The  obligations  in this  paragraph  will survive  termination  of this
undertaking.

Interpretation
7. In this undertaking the "Offer" means the offer to be made by or on behalf of
Amerada Hess to acquire  ordinary  shares of 25p each in the capital of Linda on
substantially the terms of the Press  Announcement or on such other terms as may
be agreed  between  Amerada  Hess and Linda or as may be required to comply with
the  requirements  of the Panel on  Takeovers  and Mergers  (the  "Panel"),  the
Financial Services  Authority or the London Stock Exchange.  A reference in this
undertaking to the "Offer" also includes any new, increased,  renewed or revised
offer made by or on behalf of Amerada Hess to acquire shares in Linda,  provided
that the terms of such offer are,  in the  opinion  of  Goldman  Sachs,  no less
favourable to acceptors than the terms set out in the Press Announcement.

Time of the Essence
8. Any time,  date or period  mentioned in this  undertaking  may be extended by
mutual agreement but as regards any time, date or period  originally fixed or as
extended, time shall be of the essence.

The Offer
9.1 Subject to paragraph 9.2, Amerada Hess agrees to make the Offer if the Press
Announcement is published,  with Amerada Hess's prior approval, in substantially
the form attached (or in such other form as may be agreed  between  Amerada Hess
and LASMO or as may be required to comply with the  requirements of the Panel on
Takeovers and Mergers (the "Panel")) by not later than 8 November 2000. Approval
of  the  release  of  the  Press  Announcement  is at  Amerada  Hess's  absolute
discretion.

9.2 Amerada Hess will not be obliged to make or proceed with the Offer if, after
the Press Announcement is published:

(a)      the Panel consents to Amerada Hess not proceeding with the Offer; or

(b)      Amerada Hess is no longer  required by the City Code of  Takeovers  and
         Mergers (the "Code") to proceed with the Offer.

9.3  Amerada  Hess  shall  have no  liability  to me for any  failure to make or
implement the Offer and I will not be entitled to specific performance of Clause
9.1 if, in each case,  Amerada Hess has become  aware that any  condition of the
Offer  as set out in the  Press  Announcement  has  become  incapable  of  being
fulfilled.

9.4      My obligations under this agreement will lapse if:

(a)      the Press Announcement is not released on 8 November 2000; or

(b)      the  Offer  is not  made  in any of the  circumstances  referred  to in
         paragraph 9.2,

and in these  circumstances  neither party will have any claim against the other
except in respect of any prior breach.

If the undertaking lapses, I shall have no claim against Amerada Hess.

Director's undertakings
10.1 As a director  of Linda,  I shall use my best  endeavours  to procure  that
Linda and the board of directors of Linda:

(a)      provide all assistance which Amerada Hess reasonably requests to enable
         it to  prepare  the  Offer  Document  and  all  related  and  ancillary
         documents in accordance with the requirements of the Code, the SEC, the
         Financial  Services  Authority  and the London  Stock  Exchange and any
         other legal or regulatory requirement or body;

(b)      provide  all  assistance  which  Amerada  Hess  reasonably  requests to
         Amerada Hess as may be required to obtain the  clearances  and consents
         referred to in the Press Announcement;

(c)      if the Offer becomes  unconditional  in all respects,  promptly approve
         the  appointment as  director(s)  of Linda of the persons  nominated by
         Amerada  Hess and,  if required by Amerada  Hess,  I shall  resign as a
         director of Linda ;

(d)      agree to any  extension  of time limits in the Code for posting of this
         Offer which Amerada Hess requests and which the Panel approves; and

(e)      not make (and that no-one makes on behalf of Linda):

             (i)  any  announcement  before the Press  Announcement  is released
                  which refers expressly or implicitly to Amerada Hess; or

            (ii)  any other  announcement  in connection  with the Offer without
                  prior consultation with Amerada Hess,

         unless Amerada Hess consents in writing or the relevant announcement is
         required by law or any regulatory provision.

10.2     I shall:

(a)      not directly or  indirectly  solicit any person other than Amerada Hess
         to propose or announce  any offer for or any scheme of  arrangement  in
         respect of any shares or other securities of Linda; or

(b)      not directly or indirectly  initiate any  discussions  with, or provide
         any information  to, any person who is or may be considering  proposing
         or announcing such an offer or scheme; or

(c)      recommend acceptance of the Offer to Linda shareholders and not modify,
         qualify or withdraw that  recommendation at any time, except insofar as
         to do so would be inconsistent with my duties as a Director of LASMO.

10.3 I shall promptly inform you of any approach by a third party which may lead
to an offer for Linda or the occurrence of any matter referred to above and will
keep you  fully  informed  of the same  (but  not of the  value of the  relevant
proposal or the identity of its proponent).

10.4 I confirm  that I know of no matter or  circumstance  which might mean that
any  condition  of the  Offer  set  out  in the  Press  Announcement  cannot  be
fulfilled.  I will  have  no  liability  to  Amerada  Hess  in  respect  of this
confirmation.

Confirmation
11. I confirm that in signing  this letter I am not a customer of Goldman  Sachs
for the purposes of the Rules of The Securities  and Futures  Authority and that
Goldman Sachs does not owe me any of the duties which it owes to its  customers.
I confirm that I have had an adequate  opportunity to consider whether or not to
give this undertaking and to obtain independent advice.

Power of Attorney
12.1  In  order  to  secure  the  performance  of  my  obligations   under  this
undertaking, I appoint any director of Amerada Hess as my attorney:

(a)      if I fail to accept or to procure acceptance of the Offer in accordance
         with  paragraphs  3(a),  3(b) or 3(c) or if I fail to accept  the offer
         referred to in paragraph 3(d) in accordance with that paragraph,  in my
         name and on my behalf to do all  things  and to  execute  all deeds and
         other  documents as may be necessary or desirable to accept such offers
         in respect of the Linda  Shares,  the  Beneficial  Shares,  any Further
         Linda  Shares  and  the  options  referred  to in  paragraph  3(d)  (as
         appropriate); and

(b)      to execute any form of proxy  required by Amerada Hess  appointing  any
         person  nominated  by  Amerada  Hess to attend  and vote on a  Relevant
         Resolution (as defined in paragraph 4.3) at a general meeting of Linda.

12.2 I agree  that this power of  attorney  is given by way of  security  and is
irrevocable  in accordance  with section 4 Powers of Attorney Act 1971 until the
Offer closes, lapses or is withdrawn.

Specific Performance
13. I agree  that,  if I fail to  accept  the  Offer  in  accordance  with  this
undertaking  or breach any of my  obligations,  damages would not be an adequate
remedy and accordingly  Amerada Hess shall be entitled to the remedy of specific
performance.

14.      General
14.1 The obligations I have accepted under this agreement are without  prejudice
to any  rights  of  Amerada  Hess or  Goldman  Sachs at  common  law or  equity.
Invalidity  of any  provision  of this  agreement  will  not  affect  any  other
provision.

14.2 Any  failure  or delay by any  person in  exercising  any  right,  power or
privilege  under  this  agreement  will not  comprise  a waiver  and a single or
partial exercise will not restrict any further exercise.

14.3 This  agreement is governed by and is to be construed  in  accordance  with
English law and each of the parties submits to the exclusive jurisdiction of the
English courts for all purposes in connection with this agreement.

<PAGE>

                                    SCHEDULE

                                 Existing Shares

PART A - Registered Holdings of Linda Ordinary Shares

Registered Holder                                             Ordinary Shares of
                                                              25p each
(Print name of giver of
undertaking)

TIMOTHY PIENNE BRENNAND                                             16,807

PART B - Beneficial Holdings of Linda Ordinary Shares

Beneficial Owner                                              Ordinary Shares of
                                                              25p each
(Print name)

-------------------------

PART C -  Options  and other  rights  to  acquire  Linda  securities  (including
options)

Holder                                                        Type of option
(Print name)

-----------------------

SIGNED and DELIVERED as a DEED by......................................

Yours faithfully,

Signature:        JOSEPH DARBY as attorney

Name:             JOSEPH DARBY as attorney

Signature of witness:      AO BRIEN

Name:                      AO BRIEN

Address:                   101 Bishopsgate
                           London  EC2M 3XH
                           SolicitorEXHIBIT 9
To:      Amerada Hess Corporation plc ("Amerada Hess")

and      Goldman Sachs International ("Goldman Sachs")

                                                                   November 2000

Dear Sirs,

I  understand  that  Amerada  Hess  intends to make an offer to acquire  all the
issued ordinary share capital of Linda plc ("Linda")  substantially on the terms
of the  attached  draft press  announcement.  This letter sets out the terms and
conditions  on which I will accept the Offer (as defined in  paragraph 7 of this
undertaking) when it is made.

Shareholdings

1.       I represent and warrant to Amerada Hess that:

(a)      I am the  registered  holder  and  beneficial  owner of the  number  of
         ordinary  shares of 25p each in the capital of Linda shown in Part A of
         the  Schedule  (the "Linda  Shares")  and that I hold these free of any
         lien,  charge,  option,  equity or encumbrance  and free from any third
         party right or interest;

(b)       I am the beneficial owner (but not registered holder) of the number of
          ordinary shares of 25p each in the capital of Linda shown in Part B of
          the Schedule (the  "Beneficial  Shares") and that I hold these free of
          any lien,  charge,  option,  equity or  encumbrance  and free from any
          third party right or interest;

(c)       the information set out in the Schedule  regarding the shares of Linda
          in which I am interested is complete and accurate;

(d)      the Schedule  contains  complete  and accurate  details of all options,
         warrants  and other  rights I may have to  subscribe  for,  purchase or
         otherwise acquire any securities of Linda; and

(e)      I have full  power and  authority  to enter into this  undertaking,  to
         perform the obligations  under it and to accept the Offer in respect of
         the Linda shares.

Dealings

2.        I undertake to Amerada Hess that before the Offer closes, lapses or is
          withdrawn, I shall not:

(a)       sell, transfer,  charge,  encumber, grant any option over or otherwise
          dispose  of any  Linda  Shares or any  Beneficial  Shares or any other
          shares or securities in Linda issued or unconditionally allotted to me
          or otherwise acquired by me before then ("Further Linda Shares") other
          than pursuant to my acceptance of the Offer;

(b)       accept any other offer in respect of the shares or securities referred
          to in paragraph 2(a);

(c)      (other  than  pursuant  to the  Offer)  enter  into  any  agreement  or
         arrangement  or permit any agreement or  arrangement to be entered into
         or incur any obligation or permit any obligation to arise:

             (i)  to do any of the acts referred to in paragraphs 2(a) or 2(b);

            (ii)  in  relation  to, or  operating  by  reference  to,  the Linda
                  Shares, the Beneficial Shares or any Further Linda Shares; or

           (iii)  which, in relation to the Linda Shares,  the Beneficial Shares
                  or any Further Linda Shares, would or might restrict or impede
                  me accepting the Offer,

         and for the avoidance of doubt,  references in this  paragraph  2(c) to
         any  agreement,  arrangement  or  obligation  includes  any  agreement,
         arrangement or obligation  whether or not legally binding or subject to
         any  condition or which is to take effect if the Offer closes or lapses
         or if this  undertaking  ceases to be  binding or  following  any other
         event; or

(d)      save for the acquisition of any further shares in Linda on the exercise
         of options referred to in Part C of the Schedule, I shall not purchase,
         sell or otherwise  deal in any shares or other  securities  of Linda or
         Amerada  Hess  or  any  interest  therein  (including  any  derivatives
         referenced to such securities).

Undertaking to accept the Offer

3.       In  consideration  of Amerada Hess's agreement in paragraph 9.1 to make
         the Offer, I undertake to Amerada Hess that:

(a)      I shall accept the Offer in respect of the Linda  Shares in  accordance
         with  the  procedure  for  acceptance  set out in the  formal  document
         containing  the Offer (the "Offer  Document") not later than seven days
         after Amerada Hess posts the Offer Document to Linda  shareholders  and
         shall  perform the  agreement to which that  acceptance  gives rise, in
         accordance with the relevant provisions of the Offer Document;

(b)      I shall take all action within my power to procure that the  registered
         holder of the  Beneficial  Securities  accepts the Offer in  accordance
         with the  relevant  provisions  of the Offer  Document and performs the
         agreement to which that  acceptance  gives rise, in accordance with the
         relevant provisions of the Offer Document;

(c)      I shall  accept  the Offer in respect of any  Further  Linda  Shares in
         accordance  with the  procedure  for  acceptance  set out in the  Offer
         Document not later than two days after the date I become the registered
         holder of the Further  Linda Shares and shall  perform the agreement to
         which that  acceptance  gives rise,  in  accordance  with the  relevant
         provisons of the Offer Document;

(d)      I shall take all action within my power to procure that the  registered
         holder  of any  further  ordinary  shares in Linda in which I acquire a
         beneficial  interest after the date of this  undertaking but of which I
         do not become  the  registered  holder  ("Further  Beneficial  Shares")
         accepts the offer and performs the  agreement to which that  acceptance
         gives rise in  accordance  with the  relevant  provisions  of the Offer
         Document.

 (e)     I shall not withdraw any  acceptances  of the Offer and shall cause the
         registered   holder(s)  of  any  Beneficial   Shares  and  any  Further
         Beneficial Shares not to do so; and

(f)      pursuant to the Offer,  Amerada Hess will acquire the Linda Shares, the
         Beneficial  Shares and any  Further  Linda  Shares  from me free of any
         lien,  charge,  option,  equity or  encumbrance  and together  with all
         rights of any nature  attaching to those shares  including the right to
         all dividends declared or paid after the date of this undertaking.

Voting Rights

4.1 From the time Amerada Hess announces the Offer to the time the Offer becomes
wholly unconditional, lapses or is withdrawn:

(a)      I shall exercise the votes attaching to my Linda Shares and any Further
         Linda Shares on a Relevant  Resolution  (as defined in  paragraph  4.3)
         only in accordance with Amerada Hess's directions;

(b)      I shall  exercise  the  rights  attaching  to my Linda  Shares  and any
         Further  Linda  Shares to  requisition  or join in  requisitioning  any
         general or class  meeting of Linda for the  purposes of  considering  a
         Relevant  Resolution  and to require  Linda  pursuant  to  section  376
         Companies  Act  1985  to  give  notice  of  such a  resolution  only in
         accordance with Amerada Hess's directions;

(c)      I shall cause the registered holder(s) of any Beneficial Shares and any
         Further Beneficial Shares to comply with paragraphs 4.1(a) and 4.1(b).

4.2  For the  purpose  of  voting  or  causing  votes  to be cast on a  Relevant
Resolution,  I shall  execute  any  form  of  proxy  required  by  Amerada  Hess
appointing  any  person  nominated  by  Amerada  Hess to attend  and vote at the
relevant general meeting of Linda .

4.3      A "Relevant Resolution" means:

(a)      a resolution  (whether or not  amended)  proposed at a general or class
         meeting of Linda, or at an adjourned  meeting,  the passing of which is
         necessary to implement the Offer or which,  if passed,  might result in
         any condition of the Offer not being fulfilled or which might impede or
         frustrate the Offer in any way;

(b)      a  resolution  to  adjourn a general or class  meeting  of Linda  whose
         business  includes the  consideration  of a resolution  falling  within
         paragraph 4.3(a); and

(c)      a resolution to amend a resolution  falling within  paragraph 4.3(a) or
         paragraph 4.3(b).

Documentation
5.1      I consent to:

(a)      the  inclusion  of  references  to me and this  undertaking  in Amerada
         Hess's  announcement  of the Offer (the "Press  Announcement")  as they
         appear in the attached draft of the Press Announcement;

(b)      particulars  of this  undertaking  and my holdings of, and dealings in,
         relevant  securities  of Linda and Amerada  Hess being  included in the
         Offer Document and any other related or ancillary  document as required
         by the Code; and

(c)      this  undertaking  being available for inspection  until the end of the
         offer period (as defined in the Code).

5.2 I shall  promptly  give you all  information  and any  assistance as you may
reasonably require for the preparation of the Offer Document and all related and
ancillary  documents in order to comply with the  requirements  of the Code, the
Financial  Services  Authority and the London Stock Exchange and any other legal
or regulatory  requirement or body. I shall immediately notify you in writing of
any  material  change in the  accuracy or impact of any  information  previously
given to you.

Secrecy

6. I will keep secret the possibility, terms and conditions of the Offer and the
existence and terms of this undertaking until the Press Announcement is released
provided  that I may disclose the same to Linda and its advisers in which case I
will use reasonable  endeavours to ensure that they observe  secrecy in the same
terms.  The  obligations  in this  paragraph  will survive  termination  of this
undertaking.

Interpretation

7. In this undertaking the "Offer" means the offer to be made by or on behalf of
Amerada Hess to acquire  ordinary  shares of 25p each in the capital of Linda on
substantially the terms of the Press  Announcement or on such other terms as may
be agreed  between  Amerada  Hess and Linda or as may be required to comply with
the  requirements  of the Panel on  Takeovers  and Mergers  (the  "Panel"),  the
Financial Services  Authority or the London Stock Exchange.  A reference in this
undertaking to the "Offer" also includes any new, increased,  renewed or revised
offer made by or on behalf of Amerada Hess to acquire shares in Linda,  provided
that the terms of such offer are,  in the  opinion  of  Goldman  Sachs,  no less
favourable to acceptors than the terms set out in the Press Announcement.

Time of the Essence

8. Any time,  date or period  mentioned in this  undertaking  may be extended by
mutual agreement but as regards any time, date or period  originally fixed or as
extended, time shall be of the essence.

The Offer

9.1 Subject to paragraph 9.2, Amerada Hess agrees to make the Offer if the Press
Announcement is published,  with Amerada Hess's prior approval, in substantially
the form attached (or in such other form as may be agreed  between  Amerada Hess
and LASMO or as may be required to comply with the  requirements of the Panel on
Takeovers and Mergers (the "Panel")) by not later than 8 November 2000. Approval
of  the  release  of  the  Press  Announcement  is at  Amerada  Hess's  absolute
discretion.

9.2 Amerada Hess will not be obliged to make or proceed with the Offer if, after
the Press Announcement is published:

(a)      the Panel consents to Amerada Hess not proceeding with the Offer; or

(b)      Amerada Hess is no longer  required by the City Code of  Takeovers  and
         Mergers (the "Code") to proceed with the Offer.

9.3  Amerada  Hess  shall  have no  liability  to me for any  failure to make or
implement the Offer and I will not be entitled to specific performance of Clause
9.1 if, in each case,  Amerada Hess has become  aware that any  condition of the
Offer  as set out in the  Press  Announcement  has  become  incapable  of  being
fulfilled.

9.4      My obligations under this agreement will lapse if:

(a)      the Press Announcement is not released on 8 November 2000; or

(b)      the  Offer  is not  made  in any of the  circumstances  referred  to in
         paragraph 9.2,

and in these  circumstances  neither party will have any claim against the other
except in respect of any prior breach.

If the undertaking lapses, I shall have no claim against Amerada Hess.

Director's undertakings

10.1 As a director  of Linda,  I shall use my best  endeavours  to procure  that
Linda and the board of directors of Linda:

(a)      provide all assistance which Amerada Hess reasonably requests to enable
         it to  prepare  the  Offer  Document  and  all  related  and  ancillary
         documents in accordance with the requirements of the Code, the SEC, the
         Financial  Services  Authority  and the London  Stock  Exchange and any
         other legal or regulatory requirement or body;

(b)      provide  all  assistance  which  Amerada  Hess  reasonably  requests to
         Amerada Hess as may be required to obtain the  clearances  and consents
         referred to in the Press Announcement;

(c)      if the Offer becomes  unconditional  in all respects,  promptly approve
         the  appointment as  director(s)  of Linda of the persons  nominated by
         Amerada  Hess and,  if required by Amerada  Hess,  I shall  resign as a
         director of Linda ;

(d)      agree to any  extension  of time limits in the Code for posting of this
         Offer which Amerada Hess requests and which the Panel approves; and

(e)      not make (and that no-one makes on behalf of Linda):

             (i)  any  announcement  before the Press  Announcement  is released
                  which refers expressly or implicitly to Amerada Hess; or

            (ii)  any other  announcement  in connection  with the Offer without
                  prior consultation with Amerada Hess,

         unless Amerada Hess consents in writing or the relevant announcement is
         required by law or any regulatory provision.

10.2     I shall:

(a)      not directly or  indirectly  solicit any person other than Amerada Hess
         to propose or announce  any offer for or any scheme of  arrangement  in
         respect of any shares or other securities of Linda; or

(b)      not directly or indirectly  initiate any  discussions  with, or provide
         any information  to, any person who is or may be considering  proposing
         or announcing such an offer or scheme; or

(c)      recommend acceptance of the Offer to Linda shareholders and not modify,
         qualify or withdraw that  recommendation at any time, except insofar as
         to do so would be inconsistent with my duties as a Director of LASMO.

10.3 I shall promptly inform you of any approach by a third party which may lead
to an offer for Linda or the occurrence of any matter referred to above and will
keep you  fully  informed  of the same  (but  not of the  value of the  relevant
proposal or the identity of its proponent).

10.4 I confirm  that I know of no matter or  circumstance  which might mean that
any  condition  of the  Offer  set  out  in the  Press  Announcement  cannot  be
fulfilled.  I will  have  no  liability  to  Amerada  Hess  in  respect  of this
confirmation.

Confirmation

11. I confirm that in signing  this letter I am not a customer of Goldman  Sachs
for the purposes of the Rules of The Securities  and Futures  Authority and that
Goldman Sachs does not owe me any of the duties which it owes to its  customers.
I confirm that I have had an adequate  opportunity to consider whether or not to
give this undertaking and to obtain independent advice.

Power of Attorney

12.1  In  order  to  secure  the  performance  of  my  obligations   under  this
undertaking, I appoint any director of Amerada Hess as my attorney:

(a)      if I fail to accept or to procure acceptance of the Offer in accordance
         with  paragraphs  3(a),  3(b) or 3(c) or if I fail to accept  the offer
         referred to in paragraph 3(d) in accordance with that paragraph,  in my
         name and on my behalf to do all  things  and to  execute  all deeds and
         other  documents as may be necessary or desirable to accept such offers
         in respect of the Linda  Shares,  the  Beneficial  Shares,  any Further
         Linda  Shares  and  the  options  referred  to in  paragraph  3(d)  (as
         appropriate); and

(b)      to execute any form of proxy  required by Amerada Hess  appointing  any
         person  nominated  by  Amerada  Hess to attend  and vote on a  Relevant
         Resolution (as defined in paragraph 4.3) at a general meeting of Linda.

12.2 I agree  that this power of  attorney  is given by way of  security  and is
irrevocable  in accordance  with section 4 Powers of Attorney Act 1971 until the
Offer closes, lapses or is withdrawn.

Specific Performance

13. I agree  that,  if I fail to  accept  the  Offer  in  accordance  with  this
undertaking  or breach any of my  obligations,  damages would not be an adequate
remedy and accordingly  Amerada Hess shall be entitled to the remedy of specific
performance.

14.      General

14.1 The obligations I have accepted under this agreement are without  prejudice
to any  rights  of  Amerada  Hess or  Goldman  Sachs at  common  law or  equity.
Invalidity  of any  provision  of this  agreement  will  not  affect  any  other
provision.

14.2 Any  failure  or delay by any  person in  exercising  any  right,  power or
privilege  under  this  agreement  will not  comprise  a waiver  and a single or
partial exercise will not restrict any further exercise.

14.3 This  agreement is governed by and is to be construed  in  accordance  with
English law and each of the parties submits to the exclusive jurisdiction of the
English courts for all purposes in connection with this agreement.

<PAGE>

                                    SCHEDULE

                                 Existing Shares

PART A - Registered Holdings of Linda Ordinary Shares

Registered Holder                                           Ordinary Shares of
                                                            25p each

(Print name of giver of
undertaking)
HUGH EDWARD NORTON                                                  12,442

PART B - Beneficial Holdings of Linda Ordinary Shares

Beneficial Owner                                            Ordinary Shares of
                                                            25p each

(Print name)
-------------------------

PART C -  Options  and other  rights  to  acquire  Linda  securities  (including
options)

Holder                                                      Type of option
(Print name)
NONE

<PAGE>

SIGNED and DELIVERED as a DEED by......................................

Yours faithfully,

Signature:        HUGH NORTON

Name:             HUGH NORTON

in the presence of:

Signature of witness:      FJ HARCUP

Name:                      FJ HARCUP

Address:          1A Portland Road
                  London  W11 4LH

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