Disclosure Of Entity's Operating Segments [Text Block]

SANTANDER UK PLC - Filing #5588864

Concept	2024-01-01 to 2024-12-31	As at 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2023-01-01 to 2023-12-31	As at 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31
Disclosure of entity's operating segments [text block]		—	—	—	—	—	—	—	—	—	—
Disclosure of operating segments [text block]	—	—	—	—	—	—	—	—	—	—	—
Disclosure of operating segments [abstract]
Disclosure of operating segments [line items]
Interest income	12,439,000,000 GBP	—	—	—	11,617,000,000 GBP	—	—	—	—	6,708,000,000 GBP	—
Interest expense	8,127,000,000 GBP	—	—	—	6,959,000,000 GBP	—	—	—	—	2,283,000,000 GBP	—
Interest income (expense)	4,312,000,000 GBP	—	—	—	4,658,000,000 GBP	—	—	—	—	4,425,000,000 GBP	—
Tax expense (income)	378,000,000 GBP	—	—	—	559,000,000 GBP	—	—	—	—	480,000,000 GBP	—
Profit (loss) before tax	1,349,000,000 GBP	—	—	—	2,100,000,000 GBP	—	—	—	—	1,874,000,000 GBP	—
Profit (loss)	971,000,000 GBP	—	971,000,000 GBP	971,000,000 GBP	1,541,000,000 GBP	—	1,541,000,000 GBP	1,541,000,000 GBP	1,394,000,000 GBP	1,394,000,000 GBP	1,394,000,000 GBP
Assets	—	259,944,000,000 GBP	—	—	—	275,448,000,000 GBP	—	—	—	—	—
Liabilities	—	246,171,000,000 GBP	—	—	—	260,825,000,000 GBP	—	—	—	—	—
Cash flows from (used in) operating activities	3,331,000,000 GBP	—	—	—	3,304,000,000 GBP	—	—	—	—	3,992,000,000 GBP	—
Cash flows from (used in) investing activities	4,540,000,000 GBP	—	—	—	2,747,000,000 GBP	—	—	—	—	198,000,000 GBP	—
Cash flows from (used in) financing activities	285,000,000 GBP	—	—	—	19,000,000 GBP	—	—	—	—	277,000,000 GBP	—