FRN Variable Rate Fix

Re: SANTANDER UK plc

EUR 750,000,000.00

MATURING: 24-Mar-2028

ISIN: XS3032031257

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

HAS BEEN FIXED AT 2.60 PCT

DAY BASIS: ACTUAL/360

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

EUR 4,936,750.00 PER EUR 750,000,000.00 DENOMINATION

View source version on businesswire.com: https://www.businesswire.com/news/home/20250922454577/en/

Citibank