LONDON–(BUSINESS WIRE)– Santander UK PLC Issue of GBP 1,100,000,000.00 Floating Rate Covered Bonds due June 2028 Series 81 Tranche 1 MTN ISSUE NAME. Our Ref. MP7664 ISIN Code. XS2643036218 TOTAL INTEREST AMT. CURRENCY CODE. GBP DAY BASIS. ACTUAL/365 FIXED (A005) NUM OF DAYS. 94 INTEREST RATE. 4.2482 PCT VALUE DATE. 14/09/2026 INTEREST PERIOD. 12/06/2026 TO 14/09/2026 GBP 12,034,626.85 POOL FACTOR. N/A