FRN Variable Rate Fix

Re: SANTANDER UK plc

EUR 500,000,000.00

MATURING: 24-Mar-2027

ISIN: XS3032006143

PLEASE BE ADVISED THAT THE INTEREST RATE FOR THE PERIOD 24-Sep-2025 TO 24-Dec-2025

HAS BEEN FIXED AT 2.45 PCT

DAY BASIS: ACTUAL/360

INTEREST PAYABLE VALUE 24-Dec-2025 WILL AMOUNT TO:

EUR 3,101,583.33 PER EUR 500,000,000.00 DENOMINATION

View source version on businesswire.com: https://www.businesswire.com/news/home/20250922284043/en/

Citibank