Supplement and Home Member State

British Telecommunications public limited company

26 February 2016

Publication of Supplement updating Existing Euro Medium Term Note Programme and Notification of Home Member State

The following Supplement has been approved by the UK Listing Authority and is available for viewing:

Supplement dated 26 February 2016 (the "Supplement") supplementing the Prospectus dated 29 May 2015 (the "Prospectus") relating to the U.S.$15,000,000,000 Euro Medium Term Note Programme of British Telecommunications public limited company ("BT").

To view the Supplement in full, please paste the following URL into the address bar of your browser:

http://www.rns-pdf.londonstockexchange.com/rns/3630Q_-2016-2-26.pdf

A copy of the Supplement will be submitted to the National Storage Mechanism and will be available shortly for inspection at: http://www.morningstar.co.uk/uk/NSM.

For further information, please contact:

BT Investor Relations

Tel: +44 20 7356 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) 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 Prospectus is not addressed. Prior to relying on the information contained in the Supplement you must ascertain from the Prospectus whether or not you are part of the intended addressees of the information contained in the Supplement.

Home Member State

For the purposes of the Transparency Directive (Directive 2004/109/EC), as amended by the Transparency Directive Amending Directive (Directive 2013/50/EU) and DTR 6.4.2 of the Financial Conduct Authority's Disclosure Rules and Transparency Rules, the Home Member State of BT is the United Kingdom.