EX-4.8





 Exhibit 4.8 

BRITISH TELECOMMUNICATIONS plc 

Issuer 
 TO

 DELAWARE TRUST COMPANY (as successor in interest to Law Debenture 

Trust Company of New York) 

Trustee 
  

 
 First
Supplemental Indenture 
 Dated as of December 4, 2018 

 
  

$675,000,000 4.500% Senior Notes due 2023 

$700,000,000 5.125% Senior Notes due 2028 

  
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 FIRST SUPPLEMENTAL INDENTURE 

FIRST SUPPLEMENTAL INDENTURE (the “First Supplemental Indenture”), dated as of December 4, 2018, among British
Telecommunications plc, a public limited company duly organized and existing under the laws of England and Wales (the “Company”), having its principal office at 81 Newgate Street, London EC1A 7AJ, England and Delaware Trust Company
(as successor in interest to Law Debenture Trust Company of New York), having its principal office at 251 Little Falls Drive, Wilmington, Delaware 19808, United States (the “Trustee”). 

RECITALS 
 WHEREAS,
the Company and the Trustee entered into an amended and restated indenture, dated as of June 26, 2015 (the “Indenture”), providing for the issuance from time to time of unsecured debentures, notes or other evidences of
indebtedness in one or more series as provided in the Indenture; 
 WHEREAS, Section 901 of the Indenture provides that, without
the consent of any Holders of Securities (as defined in the Indenture), the Company, when authorized by a Board Resolution, and the Trustee, at any time and from time to time, may enter into one or more indentures supplemental to the Indenture, in
form satisfactory to the Trustee, for certain purposes, including to add to the covenants of the Company for the benefit of the Holders of all or any series of securities, or to add to, change or eliminate any of the provisions of the Indenture in
respect of one or more series, provided that any such addition, change, or elimination (i) shall neither (A) apply to any security of any series created prior to the execution of such supplemental indenture and entitled to the benefit of
such provision or (B) modify the rights of the Holder of any such security with respect to such provision or (ii) shall become effective only when there is no such security Outstanding; 

WHEREAS, pursuant to Section 301 of the Indenture, the Company may, from time to time, create and issue any series of securities
in one or more indentures supplemental to the Indenture; 
 WHEREAS, on the date hereof the Company intends to issue pursuant to its
Registration Statement on Form F-3 (File No. 333-225979) (the “Registration Statement”), dated June 29, 2018, the Prospectus Supplement dated
November 29, 2018 and related Base Prospectus dated June 29, 2018 (together, the “Prospectus”) and the Indenture, US$675,000,000 of 4.500% senior notes due 2023 (the “2023 Notes”) and
US$700,000,000 of 5.125% senior notes due 2028 (the “2028 Notes” and, together with the 2023 Notes, the “Notes”), having the terms and conditions contemplated in the Prospectus as provided for in the
Indenture, as supplemented by this First Supplemental Indenture; 
 WHEREAS, the Board of Directors of the Company has authorized
this First Supplemental Indenture; 
 WHEREAS, any and all conditions and requirements necessary to make this First Supplemental
Indenture a valid, binding, and legal instrument in accordance with the terms of the Indenture have been performed and fulfilled and the execution and delivery of this First Supplemental Indenture have been in all respects duly authorized; 

  
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 WHEREAS, pursuant to Section 901 of the Indenture, the Trustee is authorized to
execute and deliver this First Supplemental Indenture; and 
 WHEREAS, the Company has requested that the Trustee execute and deliver
this First Supplemental Indenture; 
 NOW, THEREFORE, for and in consideration of the premises and the mutual covenants contained
herein and in the Indenture and for other good and valuable consideration, the receipt and sufficiency of which are herein acknowledged, the Company and the Trustee hereby agree, for the equal and ratable benefit of the Holders, as follows: 

ARTICLE ONE 
 DEFINITIONS

 Section 1.01. Defined Terms. All capitalized terms used but not defined herein shall have the meanings ascribed to such
terms in the Indenture, as supplemented and amended hereby. All definitions in the Indenture shall be read in a manner consistent with the terms of this First Supplemental Indenture. 

ARTICLE TWO 
 TERMS OF
THE NOTES 
 Section 2.01. Optional Redemption. Prior to November 4, 2023 (the date that is one month prior to the scheduled
maturity for the 2023 Notes), the Company may redeem the Notes, in whole or in part, at any time and from time to time at a redemption price equal to the greater of (i) 100% of the principal amount of such series of notes or (ii) the sum of the
present values of the principal amount of such series of notes and the Remaining Term Interest on such series of notes (exclusive of interest accrued to the date of redemption) discounted to the redemption date on a semi-annual basis at (x) the
Treasury Rate plus 0.250%, plus in each case accrued interest thereon to but excluding the date of redemption. On or after November 4, 2023 (the date that is one month prior to the scheduled maturity date for the 2023 Notes), the Company may redeem
the 2023 Notes, in whole or in part, at any time, and from time to time at a redemption price equal to 100% of the principal amount of the notes to be redeemed, plus accrued and unpaid interest, if any thereon to, but excluding, the date of
redemption. 
 Prior to September 4, 2028 (the date that is three months prior to the scheduled maturity for the 2028 Notes), the Company
may redeem the 2028 Notes, in whole or in part, at any time and from time to time at a redemption price equal to the greater of (i) 100% of the principal amount of such series of notes or (ii) the sum of the present values of the principal
amount of such series of notes and the Remaining Term Interest on such series of notes (exclusive of interest accrued to the date of redemption) discounted to the redemption date on a semi-annual basis at (x) the Treasury Rate plus 0.350%, plus
in each case accrued interest thereon to but excluding the date of redemption. On or after September 4, 2028 (the date that is three months prior to the scheduled maturity date for the 2028 Notes), the Company may redeem the 2028 Notes, in whole or
in part, at any time, and from time to time at a redemption price equal to 100% of the principal amount of the notes to be redeemed, plus accrued and unpaid interest, if any thereon to, but excluding, the date of redemption. 

Section 2.02. Defeasance and Discharge. The Company may release itself from any payment or other obligations on the Notes pursuant
to Section 403 of the Indenture. 
 Section 2.03. Maintenance of Office or Agency. The Company shall maintain one or more
Paying Agents in each Place of Payment for the Notes. The Corporate Trust Office of the Trustee in Wilmington, Delaware shall be the Paying Agent for the Notes. At any time, the Company may designate additional Paying Agents, rescind the designation
of any Paying Agents, or approve a change in the office through which a Paying Agent acts. However, the Company is required to maintain a Paying Agent in London. 

  
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 Section 2.04. Business Day. The definition of “Business Day” in the
Indenture shall be replaced in its entirety with the following: 
 “, means each Monday, Tuesday, Wednesday, Thursday and Friday which
is not a day on which banking institutions or trust companies in the State of New York or in the State of Delaware are authorized or obligated by law or executive order to close .” 

Section 2.05. Corporate Trust Office. The definition of “Corporate Trust Office” in the Indenture shall be replaced in
its entirety with the following: 
 “means the principal office of the Trustee, at which at any particular time its corporate trust
business shall be administered, which, at the date of this Indenture, is 251 Little Falls Drive, Wilmington, Delaware 19808.” 

Section 2.06. Appointment of Agent for Service. The first sentence of Section 115 shall be replaced in its entirety with the
following: 
 “The Company hereby appoints BT Americas Inc., 8951 Cypress Waters Blvd, Suite 200, Dallas TX 75019, United States of
America (FAO: General Counsel) or its successor as its authorized agent (the “Authorized Agent”) upon which process may be served in any action based on this Indenture which may be instituted in any State or Federal court in the City,
County and State of New York and expressly accepts the jurisdiction of any such court in respect of such action.” 
 Section 2.04.
New York Corporate Trust Office requirement. As it applies to the Securities, the first sentence of Section 609 of the Indenture shall be replaced in its entirety with the following: 

“There shall at all times be a Trustee hereunder which shall be a corporation organized and doing business under the laws of the United
States of America, any State thereof or the District of Columbia, authorized under such laws to exercise corporate trust powers, having a combined capital and surplus of at least $50,000,000, subject to supervision or examination by Federal or State
authority.” 
 Section 2.07. Maintenance of Office or Agency. The third sentence of Section 1002 of the Indenture
shall be replaced in its entirety with the following: 
 “Unless otherwise specified pursuant to Section 301, the Company will
maintain an office or agency where notices and demands to or upon the Company in respect of the Securities of any series and this Indenture may be served.” 

ARTICLE THREE 
 SECURITY
FORMS 
 Section 3.01. Form of Securities. The 2023 Notes shall be substantially in the form set forth in Exhibit A hereto
and the 2028 Notes shall be substantially in the form set forth in Exhibit B hereto. 

  
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 ARTICLE FOUR 

MISCELLANEOUS 

Section 4.01. Effect of the First Supplemental Indenture. This First Supplemental Indenture supplements the Indenture and shall be
a part, and subject to all the terms, thereof. The Indenture, as supplemented and amended by this First Supplemental Indenture, is in all respects ratified and confirmed, and the Indenture and the First Supplemental Indenture shall be read, taken
and construed as one and the same instrument; provided, however, that any provision in this First Supplemental Indenture which conflicts with any corresponding provision in the Indenture shall replace such conflicting terms in the Indenture in their
entirety, to the extent that such terms relate to the Notes and any Securities issued hereafter (unless otherwise provided in the applicable supplemental indenture). All provisions included in this First Supplemental Indenture supersede any
conflicting provisions included in the Indenture unless not permitted by law. 
 Section 4.02. Governing Law. This First
Supplemental Indenture shall be governed by, and construed in accordance with, the laws of the State of New York. 
 Section 4.03.
Trustee Makes no Representation. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this First Supplemental Indenture or for or in respect of the recitals contained herein, all of
which are made solely by the Company. 
 Section 4.04. Effect of Headings. The section headings herein are for convenience only
and shall not affect the construction of this First Supplemental Indenture. 
 Section 4.05 Counterparts. The parties may sign
any number of copies of this First Supplemental Indenture, and each signed copy shall be an original, but all such counterparts shall represent but one and the same agreement. 

Section 4.06. Successor and Assigns. All covenants and agreements in this First Supplemental Indenture by the Company, the Trustee
and the Holders shall bind their respective successors and assigns, whether so expressed or not. 
 Section 4.07. Severability
Clause. In case any provision in this First Supplemental Indenture or in the Securities shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or
impaired thereby. 
 Section 4.08. Benefits of First Supplemental Indenture. Nothing in this First Supplemental Indenture
or in the Securities shall give to any Person (other than the parties hereto and their successors hereunder, any Paying Agent and Holders) any benefit or any legal or equitable right, remedy or claim under this First Supplemental Indenture. 

[SIGNATURE PAGE TO FOLLOW IMMEDIATELY] 

  
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 IN WITNESS WHEREOF, the parties hereto have caused this First Supplemental Indenture to be
duly executed by their respective officers thereunto duly authorized as of the day and year first written above. 
  

			
	 The Common Seal of BRITISH TELECOMMUNICATIONS plc hereunto

affixed is authenticated



 
			
		
	By:	 	H. G. Brierley
	Name: H. G. Brierley
	Title: Secretary


  

			
	 DELAWARE TRUST COMPANY (as

successor in interest to Law Debenture
 Trust Company of New
York)



 
			
		
	By:	 	Thomas Musarra
	Name: Thomas Musarra
	Title: Vice President



  
 6 













 Exhibit A 

UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), TO THE COMPANY
OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE, OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO
CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF,
CEDE & CO., HAS AN INTEREST HEREIN. 
 [FORM OF REGISTERED SECURITY] 

[FORM OF FACE OF REGISTERED SECURITY] 

BRITISH TELECOMMUNICATIONS PLC 

4.500% NOTES DUE 2023 
 No. J-__ 
 U.S.$ _____________ 

ISIN: US111021AM38 
 CUSIP: 111021 AM3

 British Telecommunications plc, a public limited company duly organized and existing under the laws of England and Wales (herein called
the “Company”, which term includes any successor Person under the Indenture referred to on the reverse hereof), for value received, hereby promises to pay Cede & Co., or registered assigns, the principal sum of U.S.$_____________
on December 4, 2023 and to pay interest thereon from the date hereof, semi-annually in arrears on June 4 and December 4 of each year, commencing on June 4, 2019 (each an “Interest Payment Date”), at a rate of 4.500% per annum, until
the principal hereof is paid or made available for payment, calculated on the basis of a 360-day year of twelve 30-day months. 

The interest so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided for in such Indenture, be
paid to the Person in whose name this Security (or one more Predecessor Securities) is registered at the close of business on the Regular Record Date for such interest which shall be the first day of the month in which an interest payment is due.

 Any such interest not so punctually paid or duly provided for will forthwith cease to be payable to the Holder on such Regular Record
Date and may either be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on a Special Record Date for the payment of such Defaulted Interest to be fixed by the Trustee,
notice whereof shall be 

  
 A-1 













 given to Holders of Securities of this series not less than 10 days prior to such Special Record Date, or be
paid at any time in any other lawful manner not inconsistent with the requirements of any securities exchange on which the Securities of this Series may be listed, and upon such notice as may be required by such exchange, all as more fully provided
in said Indenture. 
 The Trustee shall act as Paying Agent with respect to the Securities of this series. 

Reference is hereby made to the further provisions of this Security set forth in the Indenture and to the provisions set forth on the reverse
hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. 
 All terms used in this
Security which are defined in the Indenture shall have the meanings assigned to them in the Indenture. 
 Unless the certificate of
authentication hereon has been executed by the Trustee referred to on the reverse hereof, by manual signature of an authorized signatory, this Security shall not be entitled to any benefit under the Indenture or be valid or obligatory for any
purpose. 
 IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed manually or in facsimile. 

 

			
	 The Common Seal of BRITISH TELECOMMUNICATIONS plc hereunto

affixed is authenticated:



 
			
		
	By:	 	 
	Name:
	Title:


 (See reverse for additional terms) 

  
 A-2 













 CERTIFICATE OF AUTHENTICATION 

This is one of the 4.500% Notes due 2023 described in the within-mentioned Indenture. 

Dated: December 4, 2018 
  

			
	 DELAWARE TRUST COMPANY (as

successor in interest to Law Debenture
 Trust Company of New
York)
 As Trustee



 
			
		
	By: 	 	 


 
			
	Authorized Signatory



  
 A-3 













 [FORM OF REVERSE OF REGISTERED SECURITY] 

This Security is one of a duly authorized issue of securities of the Company (herein called the “Securities”), issued and to be
issued in one or more series under an Amended and Restated Indenture dated as of June 26, 2015 (the “Amended and Restated Indenture”) between the Company and Delaware Trust Company, as successor Trustee under the Indenture (herein
called the “Trustee”, which term includes any successor trustee under the Indenture), as supplemented by the First Supplemental Indenture dated December 4, 2018, between the Company and the Trustee (the “First Supplemental
Indenture” and, together with the Amended and Restated Indenture, the “Indenture”) to which Indenture and all indentures supplemental thereto reference is hereby made for a statement of the respective rights, limitations of rights,
duties and immunities thereunder of the Company, the Trustee and the Holders of the Securities and of the terms upon which the Securities are, and are to be, authenticated and delivered. This Security is one of the series designated on the face
hereof, limited in aggregate principal amount to U.S.$500,000,000. The Securities of this series are issued in registered form in minimum denominations of $200,000 and integral multiples of $1,000 in excess thereof. 

The Company will pay to the Holders of Securities such Additional Amounts as may become payable under Section 1004 of the Indenture. 

The Company may redeem the Securities, in whole or in part, at any time and from time to time at a redemption price equal to the greater of
(i) 100% of the principal amount of such notes or (ii) the sum of the present values of the principal amount of such note and the Remaining Term Interest on such note (exclusive of interest accrued to the date of redemption) discounted to the
date of redemption on a semi-annual basis at the Treasury Rate plus 0.250%, plus in each case interest accrued to but excluding the date of redemption. On or after November 4, 2023 (the date that is one month prior to the scheduled maturity date for
the Securities), the Company may redeem the Securities, in whole or in part, at any time, and from time to time at a redemption price equal to 100% of the principal amount of the notes to be redeemed, plus accrued and unpaid interest, if any thereon
to, but excluding, the date of redemption. 
 The Securities may also be redeemed at the option of the Company in whole but not in part at
any time at a redemption price equal to the principal amount thereof plus accrued interest to the date fixed for redemption if the Company satisfies the Trustee that, as a result of any change in or amendment to the laws or any regulations or
rulings promulgated thereunder of the United Kingdom or of any political subdivision or taxing authority of or in the United Kingdom or any change in the official application or interpretation of such laws, regulations or rulings, or any change in
the official application or interpretation of, or any execution of or amendment to, any treaty or treaties affecting taxation to which the United Kingdom is a party, which change, execution or amendment becomes effective on or after the date on
which agreement is reached to issue the first tranche of such series of Securities the Company has been or will be required to pay additional amounts with respect to the Securities as described in Section 1004 of the Indenture. Prior to the
giving of notice of redemption of such Securities pursuant to this provision, the Company will deliver to the Trustee an Officers’ Certificate, stating that the Company is entitled to effect such redemption and setting forth in reasonable
detail a statement of circumstances showing that the conditions precedent to the right of the Company to redeem such Securities pursuant to this provision has been satisfied. Such Officers’ Certificate shall attach a certificate of an
independent lawyer or accountant to the effect that the circumstances required to be established for this provision pursuant to Section 1108 of the Indenture exist. 

  
 A-4 













 Notice of any redemption shall be mailed at least 15 days but not more than 30 days before
the redemption date to each holder of Securities to be redeemed. All Securities surrendered for payment or exchange shall be delivered to the Trustee. The Trustee shall cancel and may destroy all such Securities surrendered for payment or exchange,
in accordance with its note destruction policy; provided, however, that if Securities are destroyed, the Trustee shall deliver a certificate of destruction to the Company. Unless the Company defaults in payment of the redemption price, on and after
the redemption date interest shall cease to accrue on the relevant Securities or portions thereof called for redemption. 
 If an Event of
Default with respect to Securities of this series shall occur and be continuing, the principal of the Securities of this series may be declared due and payable in the manner and with the effect provided in the Indenture. 

The Indenture permits, with certain exceptions as therein provided, the amendment thereof and the modification of the rights and obligations
of the Company and the rights of the Holders of the Securities under the Indenture at any time by the Company and the Trustee with the consent of the Holders of
662⁄3% in principal amount of the Securities at the time Outstanding. The Indenture also contains provisions permitting the Holders of not less than 662⁄3% in principal amount of the Securities at the time Outstanding, on behalf of the Holders of all Securities of such series, to waive compliance by the Company with
certain provisions of the Indenture and not less than a majority in principal amount of the Securities at the time Outstanding to waive certain past defaults under the Indenture and their consequences. Any such consent or waiver by the Holder of
this Security shall be conclusive and binding upon such Holder and upon all future Holders of this Security and any coupon appertaining hereto and of any Security issued in exchange herefor or in lieu hereof, whether or not notation of such consent
or waiver is made upon this Security. 
 As set forth in, and subject to, the provisions of the Indenture, no Holder of any Security of this
series or will have any right to institute any proceeding with respect to the Indenture, this Security or for any remedy thereunder, unless such Holder shall have previously given to the Trustee written notice of a continuing Event of Default with
respect to the Securities of this series. The Holders of not less than 25% in principal amount of the Outstanding Securities of this series shall have made written request, and offered reasonable indemnity, to the Trustee to institute such
proceeding as trustee, and the Trustee shall not have received from the Holders of a majority in principal amount of the Outstanding Securities of this series a direction inconsistent with such request and shall have failed to institute such
proceeding within 60 days; provided, however, that such limitations do not apply to a suit instituted by the Holder hereof or any related coupon for the enforcement of payment of the principal of or any interest on this Security or payment of such
coupon on or after the respective due dates expressed herein or in such coupon. 

  
 A-5 













 No reference herein to the Indenture and no provision of this Security or of the Indenture
shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the principal of and any interest (including additional amounts, as described on the face hereof) on this Security at the times, places and rate, and in
the coin or currency, herein prescribed. 
 The Indenture and the Securities shall be governed by and construed in accordance with the laws
of the State of New York. 

  
 A-6 













 Exhibit B 

UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), TO THE COMPANY
OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE, OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO
CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF,
CEDE & CO., HAS AN INTEREST HEREIN. 
 [FORM OF REGISTERED SECURITY] 

[FORM OF FACE OF REGISTERED SECURITY] 

BRITISH TELECOMMUNICATIONS PLC 

5.125% NOTES DUE 2028 
 No. K-__ 
 U.S.$ _____________ 

ISIN: US111021AL54 
 CUSIP: 111021 AL5

 British Telecommunications plc, a public limited company duly organized and existing under the laws of England and Wales (herein called
the “Company”, which term includes any successor Person under the Indenture referred to on the reverse hereof), for value received, hereby promises to pay Cede & Co., or registered assigns, the principal sum of U.S.$_____________
on December 4, 2028 and to pay interest thereon from the date hereof, semi-annually in arrears on June 4 and December 4 of each year, commencing on June 4, 2019 (each an “Interest Payment Date”), at a rate of 5.125% per annum, until
the principal hereof is paid or made available for payment, calculated on the basis of a 360-day year of twelve 30-day months. 

The interest so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided for in such Indenture, be
paid to the Person in whose name this Security (or one more Predecessor Securities) is registered at the close of business on the Regular Record Date for such interest which shall be the first day of the month in which an interest payment is due.

 Any such interest not so punctually paid or duly provided for will forthwith cease to be payable to the Holder on such Regular Record
Date and may either be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on a Special Record Date for the payment of such Defaulted Interest to be fixed by the Trustee,
notice whereof shall be 

  
 B-1 













 
given to Holders of Securities of this series not less than 10 days prior to such Special Record Date, or be paid at any time in any other lawful manner not inconsistent with the requirements of
any securities exchange on which the Securities of this Series may be listed, and upon such notice as may be required by such exchange, all as more fully provided in said Indenture. 

The Trustee shall act as Paying Agent with respect to the Securities of this series. 

Reference is hereby made to the further provisions of this Security set forth in the Indenture and to the provisions set forth on the reverse
hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. 
 All terms used in this
Security which are defined in the Indenture shall have the meanings assigned to them in the Indenture. 
 Unless the certificate of
authentication hereon has been executed by the Trustee referred to on the reverse hereof, by manual signature of an authorized signatory, this Security shall not be entitled to any benefit under the Indenture or be valid or obligatory for any
purpose. 
 IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed manually or in facsimile. 

 

			
	 The Common Seal of BRITISH TELECOMMUNICATIONS plc hereunto

affixed is authenticated:



 
			
		
	By:	 	 
	Name:
	Title:


  
 (See reverse for additional terms)


  
 B-2 













 CERTIFICATE OF AUTHENTICATION 

This is one of the 5.125% Notes due 2028 described in the within-mentioned Indenture. 

Dated: December 4, 2018 
  

			
	 DELAWARE TRUST COMPANY (as

successor in interest to Law Debenture
 Trust Company of New
York)

	
	As Trustee


 
			
		
	By: 	 	 


 
			
	Authorized Signatory



  
 B-3 













 [FORM OF REVERSE OF REGISTERED SECURITY] 

This Security is one of a duly authorized issue of securities of the Company (herein called the “Securities”), issued and to be
issued in one or more series under an Amended and Restated Indenture dated as of June 26, 2015 (the “Amended and Restated Indenture”) between the Company and Delaware Trust Company, as successor Trustee under the Indenture (herein
called the “Trustee”, which term includes any successor trustee under the Indenture), as supplemented by the First Supplemental Indenture dated December 4, 2018, between the Company and the Trustee (the “First Supplemental
Indenture” and, together with the Amended and Restated Indenture, the “Indenture”) to which Indenture and all indentures supplemental thereto reference is hereby made for a statement of the respective rights, limitations of rights,
duties and immunities thereunder of the Company, the Trustee and the Holders of the Securities and of the terms upon which the Securities are, and are to be, authenticated and delivered. This Security is one of the series designated on the face
hereof, limited in aggregate principal amount to U.S.$500,000,000. The Securities of this series are issued in registered form in minimum denominations of $200,000 and integral multiples of $1,000 in excess thereof. 

The Company will pay to the Holders of Securities such Additional Amounts as may become payable under Section 1004 of the Indenture. 

The Company may redeem the Securities, in whole or in part, at any time and from time to time at a redemption price equal to the greater of
(i) 100% of the principal amount of such notes or (ii) the sum of the present values of the principal amount of such note and the Remaining Term Interest on such note (exclusive of interest accrued to the date of redemption) discounted to the
date of redemption on a semi-annual basis at the Treasury Rate plus 0.350%, plus in each case interest accrued to but excluding the date of redemption. On or after September 4, 2028 (the date that is three months prior to the scheduled maturity date
for the Securities), the Company may redeem the Securities, in whole or in part, at any time, and from time to time at a redemption price equal to 100% of the principal amount of the notes to be redeemed, plus accrued and unpaid interest, if any
thereon to, but excluding, the date of redemption. 
 The Securities may also be redeemed at the option of the Company in whole but not in
part at any time at a redemption price equal to the principal amount thereof plus accrued interest to the date fixed for redemption if the Company satisfies the Trustee that, as a result of any change in or amendment to the laws or any regulations
or rulings promulgated thereunder of the United Kingdom or of any political subdivision or taxing authority of or in the United Kingdom or any change in the official application or interpretation of such laws, regulations or rulings, or any change
in the official application or interpretation of, or any execution of or amendment to, any treaty or treaties affecting taxation to which the United Kingdom is a party, which change, execution or amendment becomes effective on or after the date on
which agreement is reached to issue the first tranche of such series of Securities the Company has been or will be required to pay additional amounts with respect to the Securities as described in Section 1004 of the Indenture. Prior to the
giving of notice of redemption of such Securities pursuant to this provision, the Company will deliver to the Trustee an Officers’ Certificate, stating that the Company is entitled to effect such redemption and setting forth in reasonable
detail a statement of circumstances showing that the conditions precedent to the right of the Company to redeem such Securities pursuant to this provision has been satisfied. Such Officers’ Certificate shall attach a certificate of an
independent lawyer or accountant to the effect that the circumstances required to be established for this provision pursuant to Section 1108 of the Indenture exist. 

  
 B-4 













 Notice of any redemption shall be mailed at least 15 days but not more than 30 days before
the redemption date to each holder of Securities to be redeemed. All Securities surrendered for payment or exchange shall be delivered to the Trustee. The Trustee shall cancel and may destroy all such Securities surrendered for payment or exchange,
in accordance with its note destruction policy; provided, however, that if Securities are destroyed, the Trustee shall deliver a certificate of destruction to the Company. Unless the Company defaults in payment of the redemption price, on and after
the redemption date interest shall cease to accrue on the relevant Securities or portions thereof called for redemption. 
 If an Event of
Default with respect to Securities of this series shall occur and be continuing, the principal of the Securities of this series may be declared due and payable in the manner and with the effect provided in the Indenture. 

The Indenture permits, with certain exceptions as therein provided, the amendment thereof and the modification of the rights and obligations
of the Company and the rights of the Holders of the Securities under the Indenture at any time by the Company and the Trustee with the consent of the Holders of
662⁄3% in principal amount of the Securities at the time Outstanding. The Indenture also contains provisions permitting the Holders of not less than 662⁄3% in principal amount of the Securities at the time Outstanding, on behalf of the Holders of all Securities of such series, to waive compliance by the Company with
certain provisions of the Indenture and not less than a majority in principal amount of the Securities at the time Outstanding to waive certain past defaults under the Indenture and their consequences. Any such consent or waiver by the Holder of
this Security shall be conclusive and binding upon such Holder and upon all future Holders of this Security and any coupon appertaining hereto and of any Security issued in exchange herefor or in lieu hereof, whether or not notation of such consent
or waiver is made upon this Security. 
 As set forth in, and subject to, the provisions of the Indenture, no Holder of any Security of this
series or will have any right to institute any proceeding with respect to the Indenture, this Security or for any remedy thereunder, unless such Holder shall have previously given to the Trustee written notice of a continuing Event of Default with
respect to the Securities of this series. The Holders of not less than 25% in principal amount of the Outstanding Securities of this series shall have made written request, and offered reasonable indemnity, to the Trustee to institute such
proceeding as trustee, and the Trustee shall not have received from the Holders of a majority in principal amount of the Outstanding Securities of this series a direction inconsistent with such request and shall have failed to institute such
proceeding within 60 days; provided, however, that such limitations do not apply to a suit instituted by the Holder hereof or any related coupon for the enforcement of payment of the principal of or any interest on this Security or payment of such
coupon on or after the respective due dates expressed herein or in such coupon. 

  
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 No reference herein to the Indenture and no provision of this Security or of the Indenture
shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the principal of and any interest (including additional amounts, as described on the face hereof) on this Security at the times, places and rate, and in
the coin or currency, herein prescribed. 
 The Indenture and the Securities shall be governed by and construed in accordance with the laws
of the State of New York. 

  
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