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 OR INTO ANY OTHER JURISDICTION OR TO ANY OTHER PERSON WHERE OR TO WHOM IT IS UNLAWFUL TO RELEASE, PUBLISH OR DISTRIBUTE THIS DOCUMENT.

THIS NOTICE CONTAINS IMPORTANT INFORMATION OF INTEREST TO THE REGISTERED AND BENEFICIAL OWNERS OF THE NOTES (AS DEFINED BELOW).

If you are in any doubt as to the action you should take, you are recommended to seek your own financial advice immediately from your stockbroker, bank manager, solicitor, accountant or other financial adviser authorised under the Financial Services and Markets Act 2000 (if you are in the United Kingdom), or from another appropriately authorised independent financial adviser and such other professional advice from your own professional advisors as you deem necessary.

ECONOMIC MASTER ISSUER PLC

(LEI: 635400KXONN4J3OEOG29)

Residential Mortgage-Backed Note Programme

Publication of Base Prospectus

London, 18 December 2025

Economic Master Issuer PLC (the "Issuer") is pleased to inform it has completed the update of its residential mortgage-backed note programme (the "Programme") established on 31 July 2020 (as updated from time to time).

The updated base prospectus in respect of the Programme (the "Base Prospectus") has been approved by the Financial Conduct Authority on 18 December 2025. To view the Base Prospectus, please paste the following URL into the address bar of your browser:

http://www.rns-pdf.londonstockexchange.com/rns/1929M_1-2025-12-18.pdf

A copy of the Base Prospectus has been submitted to the National Storage Mechanism and will be shortly available for inspection (subject to securities laws) at https://data.fca.org.uk/#/nsm/nationalstoragemechanism.                        

For reference, the ISINs of the outstanding Notes are as follows: Series 2020-1 Class A2 Notes ISIN: XS2206912920; Series 2021-1 Class A Notes (Regulation S) ISIN: XS2347638574; Series 2021-1 Class A Notes (Rule 144A) ISIN: XS2347637840; Series 2023-1 Class A Notes ISIN: XS2545262235; Series 2023-2 Class A Notes ISIN: XS2710130605, Series 2024-1 Class A Notes (Regulation S) ISIN: XS2856907063 and Series 2025-1 Class A Notes (Regulation S) ISIN: XS3083792302.

For enquiries, please contact:

Economic Master Issuer plc

10th Floor

5 Churchill Place

London

E14 5HU

Email: [email protected]