SANTANDER UK PLC — Capital/Financing Update 2026

May 15, 2026

National Storage Mechanism | Additional information

RNS Number : 5859E

Santander UK Plc

15 May 2026

SANTANDER UK PLC

€35 BILLION GLOBAL COVERED BOND PROGRAMME

Publication of Final Terms - Series 97

The following final terms (the Final Terms) are available for viewing:

Issue of Series 97 £750,000,000 Floating Rate Covered Bonds due May 2031 (XS3377509586) (the Covered Bonds) under the €35 billion Global Covered Bond Programme of Santander UK plc (the Programme).

To view the full Final Terms, please click on or paste the following URL into the address bar of your browser:

http://www.rns-pdf.londonstockexchange.com/rns/5859E_1-2026-5-15.pdf

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

The Final Terms can also be viewed at: https://www.santander.co.uk/uk/about-santander-uk/debt-investors/santander-uk-covered-bonds.

Please see Annex 1 to this notice for additional information in relation to the Covered Bonds.

For further information, please contact:

Funding, Asset Rotation and Investor Relations

Santander UK plc

2 Triton Square

Regent's Place

London NW1 3AN

Email: [email protected]

DISCLAIMER - INTENDED ADDRESSEES

Please note that the information contained in the Final Terms and the base prospectus published in respect of the Programme on 17 March 2026 as supplemented on 1 May 2026 and 8 May 2026 (the Prospectus) may be addressed to and/or targeted at persons who are residents of particular countries only (as further specified in the Prospectus) 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 Final Terms and the Prospectus is not addressed. Prior to relying on the information contained in the Final Terms and the Prospectus you must ascertain from the Final Terms and the Prospectus whether or not you are part of the intended addressees of the information contained therein. Your right to access this service is conditional upon complying with the above requirement.

ANNEX 1

ADDITIONAL INFORMATION IN RELATION TO SERIES 97 £750,000,000 FLOATING RATE COVERED BONDS DUE MAY 2031

OPERATIONAL INFORMATION DOCUMENT

This Operational Information Document related to the Final Terms dated 15 May 2026 (the Final Terms) in respect of the issue of Series 97 £750,000,000 Floating Rate Covered Bonds due May 2031 (XS3377509586).

This Operational Information Document has not been reviewed or approved by the FCA for the purposes of the rules in the Prospectus Rules: Admission to Trading on a Regulated Market sourcebook (the PRM) or otherwise and does not form part of the Final Terms for the purposes of the PRM. However, for all other purposes this Operational Information Document must be read in conjunction with the Final Terms. Words and expressions which have a defined meaning in the Final Terms or Base Prospectus dated 17 March 2026 as supplemented on 1 May 2026 and 8 May 2026 and have the same meanings in this Operational Information Document.

DISTRIBUTION

(a) If syndicated, names of Joint Lead Managers:          Banco Santander, S.A.;

Bank of Montreal, London Branch;

Nomura International plc;

RBC Europe Limited; and

Standard Chartered Bank

(each a "Joint Lead Manager" and together, the "Joint Lead Managers")

(b) Date of Subscription Agreement:                              15 May 2026

(c) If not syndicated, name of relevant Dealer:               Not applicable

(d) U.S. Selling Restrictions:                                            Regulation S

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END

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