THIS ANNOUNCEMENT RELATES TO THE DISCLOSURE OF INFORMATION THAT QUALIFIED OR MAY HAVE QUALIFIED AS INSIDE INFORMATION WITHIN THE MEANING OF ARTICLE 7(1) OF THE MARKET ABUSE REGULATION (EU) 596/2014 AS IT FORMS PART OF UK DOMESTIC LAW BY VIRTUE OF THE EUROPEAN UNION (WITHDRAWAL) ACT 2018, AS AMENDED.

NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN OR INTO OR TO ANY PERSON LOCATED OR RESIDENT IN THE UNITED STATES OF AMERICA, ITS TERRITORIES AND POSSESSIONS, ANY STATE OF THE UNITED STATES OF AMERICA OR THE DISTRICT OF COLUMBIA (THE "UNITED STATES") OR IN OR INTO OR TO ANY PERSON LOCATED OR RESIDENT IN ANY OTHER JURISDICTION WHERE OR TO WHOM IT IS UNLAWFUL TO RELEASE, PUBLISH OR DISTRIBUTE THIS ANNOUNCEMENT.

14 June 2024

BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY ANNOUNCES MAXIMUM ACCEPTANCE AMOUNT

British Telecommunications public limited company (the "Offeror") announces today, with reference to the invitations made to the holders of its outstanding EUR 650,000,000 0.500 per cent. Notes due 12 September 2025 (ISIN: XS2051494222) (the "2025 Notes") and EUR 1,300,000,000 1.750 per cent. Notes due 10 March 2026 (ISIN: XS1377679961) (the "2026 Notes" and together with the 2025 Notes, the "Notes" and each a "Series") as described in the tender offer memorandum dated 13 June 2024 (the "Tender Offer Memorandum") (each such invitation an "Offer" and together the "Offers") that, following pricing of the New Notes to be issued by the Offeror, the Maximum Acceptance Amount in respect of the Offers is EUR 750,000,000 in aggregate nominal amount of Notes.

The Offeror reserves the right, in its sole and absolute discretion and for any reason, to increase or decrease the Maximum Acceptance Amount. The Offeror will announce the final Series Acceptance Amounts as soon as reasonably practicable after the Pricing Time on 20 June 2024.

The Offers commenced on 13 June 2024 and will expire at 4.00 p.m. (London time) on 19 June 2024. Settlement is expected to take place on 24 June 2024.

The Offers are being made on the terms and subject to the conditions (including satisfaction or waiver of the New Financing Condition) contained in the Tender Offer Memorandum and should be read in conjunction with the Tender Offer Memorandum. Capitalised terms used but not otherwise defined in this announcement shall have the meaning given to them in the Tender Offer Memorandum.

Barclays Bank PLC and J.P. Morgan Securities plc are acting as Dealer Managers for the Offers and Kroll Issuer Services Limited is acting as Tender Agent. For detailed terms of the Offers please refer to the Tender Offer Memorandum which (subject to offer and distribution restrictions) can be obtained from the Dealer Managers and the Tender Agent referred to below.

This announcement is released by British Telecommunications public limited company and contains information that qualified or may have qualified as inside information for the purposes of Article 7 of the Market Abuse Regulation (EU) 596/2014 as it forms part of United Kingdom domestic law by virtue of the European Union (Withdrawal) Act 2018, as amended ("UK MAR"), encompassing information relating to the Offers, as described above. For the purposes of UK MAR and the Implementing Technical Standards, this announcement is made by Andrew Binnie, BT Group Treasury Director of the Offeror.

DISCLAIMER

This announcement must be read in conjunction with the Tender Offer Memorandum. This announcement and the Tender Offer Memorandum contain important information which should be read carefully before any decision is made with respect to the Offers. If any Qualifying Holder is in any doubt as to the contents of this announcement, the Tender Offer Memorandum or the action it should take, it is recommended to seek its own financial, legal, regulatory and tax advice, including in respect of any tax consequences, immediately from its broker, bank manager, solicitor, accountant or other independent financial, tax or legal adviser.

None of the Offeror, the Dealer Managers or the Tender Agent or any of their respective directors, employees, officers, agents or affiliates expresses any opinion about the merits of the Offers or makes any recommendation as to whether or not any Qualifying Holder should offer to sell its Notes and no one has been authorised by the Offeror, the Dealer Managers or the Tender Agent to make any such recommendation.

OFFER RESTRICTIONS

UNITED STATES

The Offers are not being made, and will not be made, directly or indirectly in or into, or by use of the mails of, or by any means or instrumentality of interstate or foreign commerce of, or of any facilities of a national securities exchange of, the United States. This includes, but is not limited to, facsimile transmission, electronic mail, telex, telephone, the internet and other forms of electronic communication. The Notes may not be tendered in the Offers by any such use, means, instrumentality or facility from or within the United States or by persons located or resident in the United States as defined in Regulation S of the U.S. Securities Act of 1933, as amended (the "Securities Act").

Accordingly, copies of this announcement, the Tender Offer Memorandum and any other documents or materials relating to the Offers are not being, and must not be, directly or indirectly, mailed or otherwise transmitted, distributed or forwarded (including, without limitation, by custodians, nominees or trustees) in or into the United States. Any purported tender of Notes in the Offers resulting directly or indirectly from a violation of these restrictions will be invalid, and any purported tender of Notes made by a person located in the United States or any agent, fiduciary or other intermediary acting on a non-discretionary basis for a principal giving instructions from within the United States will be invalid and will not be accepted.

This announcement or the Tender Offer Memorandum is not an offer to buy or sell, or a solicitation of an offer to buy or sell, any Notes or other securities in the United States. Securities may not be offered or sold in the United States absent registration under, or an exemption from the registration requirements of, the Securities Act.

Each Holder of Notes participating in the Offers will represent that it is not a U.S. person, it is not located in the United States and it is not participating in the Offers from the United States or it is acting on a non-discretionary basis for a principal located outside the United States that is not giving an order to participate in the Offers from the United States.

For the purposes of this and above paragraphs, "United States" means the United States of America, its territories and possessions, any state of the United States of America and the District of Columbia.

UNITED KINGDOM

The communication of this announcement, the Tender Offer Memorandum and any other documents or materials relating to the Offers is not being made and such documents and/or materials have not been approved by an authorised person for the purposes of section 21 of the Financial Services and Markets Act 2000. Accordingly, such documents and/or materials are not being distributed to, and must not be passed on to, the general public in the United Kingdom. The communication of such documents and/or materials as a financial promotion is only being made to, and may only be acted upon by, those persons in the United Kingdom falling within the definition of investment professionals (as defined in Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005, as amended (the "Financial Promotion Order")) or persons who are within Article 43 of the Financial Promotion Order or any other persons to whom it may otherwise lawfully be made under the Financial Promotion Order.

BELGIUM

None of this announcement, the Tender Offer Memorandum or any other documents or materials relating to the Offers have been submitted to or will be submitted for approval or recognition to the Belgian Financial Services and Markets Authority (Autorité des services et marchés financiers / Autoriteit financiële diensten en markten) and, accordingly, the Offers may not be made in Belgium by way of a public offering, as defined in Articles 3 and 6 of the Belgian Law of 1 April 2007 on public takeover bids (the "Belgian Takeover Law"), as amended or replaced from time to time. Accordingly, the Offers may not be advertised and the Offers will not be extended, and none of this announcement, the Tender Offer Memorandum or any other documents or materials relating to the Offers (including any memorandum, information circular, brochure or any similar documents) has been or shall be distributed or made available, directly or indirectly, to any individual or legal entity in Belgium other than (i) in reliance upon any private placement exemption set out in Article 6, §3 of the Belgian Takeover Law or (ii) in any circumstances set out in Article 6, §4 of the Belgian Takeover Law.

Insofar as Belgium is concerned, this announcement and the Tender Offer Memorandum have been issued only for the personal use of the above investors qualifying for the private placement exemption set out in Article 6, §3 of the Belgian Takeover Law and exclusively for the purpose of the Offers. Accordingly, the information contained in this announcement and the Tender Offer Memorandum may not be used for any other purpose or disclosed to any other person in Belgium.

FRANCE

This announcement, the Tender Offer Memorandum and any documents or offering materials relating to the Offers may not be distributed in the Republic of France except to qualified investors (investisseurs qualifiés) as defined in Article 2(e) of Regulation (EU) 2017/1129, as amended (the "Prospectus Regulation") and Article L.411-2 of the French Code monétaire et financier as amended from time to time. This announcement and the Tender Offer Memorandum have not been and will not be submitted for clearance to nor approved by the Autorité des marchés financiers.

REPUBLIC OF ITALY

None of the Offers, this announcement, the Tender Offer Memorandum or any other documents or materials relating to the Offers has been or will be submitted to the clearance procedures of the Commissione Nazionale per le Società e la Borsa ("CONSOB") pursuant to Italian laws and regulations. The Offers are being carried out in the Republic of Italy ("Italy") as exempted offers pursuant to article 101-bis, paragraph 3-bis of the Legislative Decree No. 58 of 24 February 1998, as amended (the "Financial Services Act") and article 35-bis, paragraph 4 of CONSOB Regulation No. 11971 of 14 May 1999, as amended. Holders or beneficial owners of the Notes that are located in Italy may tender their Notes in the Offers through authorised persons (such as investment firms, banks or financial intermediaries permitted to conduct such activities in Italy in accordance with the Financial Services Act, CONSOB Regulation No. 20307 of 15 February 2018, as amended from time to time, and Legislative Decree No. 385 of 1 September 1993, as amended) and in compliance with applicable laws and regulations or with requirements imposed by CONSOB or any other Italian authority.

Each intermediary must comply with the applicable laws and regulations concerning information duties vis-à-vis its clients in connection with the Notes and/or the Offers.

GENERAL

This announcement and the Tender Offer Memorandum do not constitute an offer to buy or the solicitation of an offer to sell Notes, and tenders of Notes for purchase pursuant to the Offers will not be accepted from Holders in any circumstances in which such offer or solicitation is unlawful.

NEW NOTES

Any investment decision to purchase any New Notes should be made solely on the basis of the information contained in (i) the prospectus dated 7 June 2024 prepared in connection with the €20,000,000,000 Euro Medium Term Note Programme of the Offeror (the "Prospectus") and (ii) the relevant final terms in respect of the New Notes pursuant to which the New Notes are intended to be issued, and no reliance is to be placed on any representations other than those contained in the Prospectus. Subject to compliance with all applicable securities laws and regulations, the Prospectus is available on the website of the Offeror and from the joint lead managers of the issue of the New Notes, on request.

The New Notes are not being, and will not be, offered or sold in the United States. Nothing in this announcement constitutes an offer to sell or the solicitation of an offer to buy the New Notes in the United States or any other jurisdiction. Securities may not be offered, sold or delivered in the United States absent registration under, or an exemption from the registration requirements of, the Securities Act. The New Notes have not been, and will not be, registered under the Securities Act or the securities laws of any state or other jurisdiction of the United States and may not be offered, sold or delivered, directly or indirectly, within the United States or to, or for the account or benefit of, U.S. persons (as defined in Regulation S under the Securities Act).

Compliance information for the New Notes: EEA MiFID II / UK MiFIR professionals / ECPs-only /No EEA or UK PRIIPs KID - Manufacturer target market (MiFID II / UK MiFIR product governance) is eligible counterparties and professional clients only (all distribution channels). No EEA or UK PRIIPs key information document (KID) has been prepared as not available to retail in EEA or UK. See the Prospectus for further information.

No action has been or will be taken in any jurisdiction in relation to the New Notes to permit a public offering of securities. The minimum denomination of the New Notes will be EUR 100,000.