21 March 2024

British Telecommunications public limited company

Publication of Supplement updating the Euro Medium Term Note Programme

The following Supplement has been approved by the Financial Conduct Authority and is available for viewing:

Supplement dated 21 March 2024 (the "Supplement") relating to the €20,000,000,000 Euro Medium Term Note Programme of British Telecommunications public limited company.

The Supplement incorporates by reference BT Group plc's Trading Update for the nine months to 31 December 2023.

To view the Supplement in full, please click on the link below:

http://www.rns-pdf.londonstockexchange.com/rns/8139H_1-2024-3-21.pdf

A copy of the Supplement will be submitted to the National Storage Mechanism and will be available shortly for inspection at: https://data.fca.org.uk/#/nsm/nationalstoragemechanism.

For further information, please contact:

BT Group Investor Relations

Tel: 0800 389 4909

E-mail: [email protected]

DISCLAIMER - INTENDED ADDRESSEES

Please note that the information contained in the Supplement may be addressed to and/or targeted at persons who are residents of particular countries (specified in the Prospectus dated 9 June 2023) only and is not intended for use and should not be relied upon by any person outside these countries and/or to whom the offer contained in the Supplement is not addressed. Prior to relying on the information contained in the Prospectus you must ascertain from the Prospectus whether or not you are part of the intended addressees of the information contained in the Supplement.