Publication of Supplementary Prospectus

ABBEY NATIONAL TREASURY SERVICES PLCU.S.$30,000,000,000 EURO MEDIUM TERM NOTE PROGRAMME and

€35 BILLION GLOBAL COVERED BOND PROGRAMMEPUBLICATION OF SUPPLEMENTARY PROSPECTUS

The following supplementary prospectus (the Supplementary Prospectus) has been approved by the UK Listing Authority and is available for viewing:

Supplementary Prospectus dated 2 March 2016 to (i) the base prospectus dated 23 June 2015, as supplemented previously on 30 July 2015, 14 August 2015, 29 October 2015 and 27 January 2016 relating to the €35,000,000,000 Global Covered Bond Programme of Abbey National Treasury Services plc, unconditionally guaranteed by Santander UK plc and unconditionally and irrevocably guaranteed as to payments of interest and principal by Abbey Covered Bonds LLP; and (ii) the base prospectus dated 5 May 2015, as supplemented previously on 30 July 2015, 14 August 2015, 29 October 2015 and 27 January 2016 relating to the U.S.$30,000,000,000 Euro Medium Term Note Programme of Abbey National Treasury Services plc unconditionally guaranteed by Santander UK plc (together, the Base Prospectuses).

To view the full Supplementary Prospectus please paste the following URL into the address bar of your browser:

[RNS to insert URL.]

A copy of the Supplementary Prospectus has been submitted to the National Storage Mechanism and will shortly be available for inspection at: www.Hemscott.com/nsm.do.

The Supplementary Prospectus can also be viewed via:

http://www.santander.co.uk/uk/about-santander-uk/debt-investors/abbey-covered-bonds 

http://www.santander.co.uk/uk/about-santander-uk/investor-relations/euro-medium-term-note-programme

For further information, please contact:

Medium Term FundingAbbey National Treasury Services plc2 Triton SquareRegent's PlaceLondon NW1 3AN

Tel: +44 (0) 20 7756 7107

Email: [email protected]

DISCLAIMER - INTENDED ADDRESSEES

Please note that the information contained in the Supplementary Prospectus and the Base Prospectuses may be addressed to and/or targeted at persons who are residents of particular countries only (as specified in the Base Prospectuses) 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 Base Prospectuses is not addressed. Prior to relying on the information contained in the Base Prospectuses you must ascertain from such Base Prospectuses whether or not you are part of the intended addressees of the information contained therein.

This publication of the Supplementary Prospectus does not constitute an offer of securities for sale in the United States. The securities described in any Base Prospectus have not been, and will not be, registered under the U.S. Securities Act of 1933, as amended (the Securities Act), or under any relevant securities laws of any state of the United States of America, and may not be offered or sold in the United States of America or to, or for the benefit of, U.S. persons (as defined in Regulation S of the Securities Act), unless the securities are registered under the Securities Act or an exemption from the registration requirements of the Securities Act is available.

Your right to access this service is conditional upon your compliance with the above requirement.