London, 29 May 2025 – ARC Ratings (UK) Limited (ARC) affirms the final, long-term public rating of ‘AAA(sf)’ assigned to Tranche A, and concurrently upgrades Tranche B to ‘AAA(sf) from ‘AA+(sf)’, Tranche C to ‘AA-(sf)’ from ‘A+(sf)’ and Tranche D to ‘A+(sf)’ from ‘A-(sf)’; all with stable outlook. These Tranches are created under Santander UK’s Synthetic Securitisation Credit Linked Note Issuance Programme, Colossus 2024-1.

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