Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2024-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
54,600,000
GBP
|
43,800,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets other than goodwill [abstract] | |||
| Intangible assets other than goodwill |
48,800,000
GBP
|
2 6 .1
GBP
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash [abstract] | |||
| Cash on hand |
300,000
GBP
|
0 .4
GBP
|
— |
| Cash and cash equivalents |
3,231,400,000
GBP
|
2 ,514. 0
GBP
|
3 , 0 4 4.1
GBP
|
| Miscellaneous assets [abstract] | |||
| Derivative financial assets |
313 .8
GBP
|
5 30.6
GBP
|
— |
| Investments other than investments accounted for using equity method |
1 ,43 4 .4
GBP
|
621,700,000
GBP
|
— |
| Loans and advances | — | — | — |
| Loans and advances to banks |
3 , 4 0 5 .9
GBP
|
2,81 3.6
GBP
|
— |
| Loans and advances to customers |
25,1 26.3
GBP
|
25,7 65.0
GBP
|
— |
| Other assets |
1 7. 8
GBP
|
2 7. 6
GBP
|
— |
| Classes of other provisions [abstract] | |||
| Other provisions [abstract] | |||
| Other provisions |
4,600,000
GBP
|
800,000
GBP
|
— |
| Borrowings, by type [abstract] | |||
| Bonds issued |
–
GBP
|
15. 2
GBP
|
— |
| Notes and debentures issued |
72 2 .7
GBP
|
3 0 7. 5
GBP
|
— |
| Miscellaneous liabilities [abstract] | |||
| Derivative financial liabilities |
81,900,000
GBP
|
1 9 9.9
GBP
|
— |
| Deposit liabilities | — | — | — |
| Deposits from banks |
1 ,9 3 5 . 2
GBP
|
3 ,57 5.0
GBP
|
— |
| Subordinated liabilities [abstract] | |||
| Subordinated liabilities |
2 5 9. 8
GBP
|
2 5 9. 5
GBP
|
— |
| Debt instruments issued |
1,0 18. 3
GBP
|
818,500,000
GBP
|
— |
| Other liabilities |
56 .4
GBP
|
3 9. 6
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
3,700,000
GBP
|
3 .9
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
3,406,400,000
GBP
|
3 ,33 0. 2
GBP
|
— |
| Miscellaneous equity [abstract] | |||
| Reserve of equity component of convertible instruments |
150,000,000
GBP
|
15 0.0
GBP
|
— |
| Capital redemption reserve |
800,000
GBP
|
0. 6
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
30,243,600,000
GBP
|
2 9, 5 8 9. 8
GBP
|
— |
| Liabilities |
28,020,200,000
GBP
|
2 7, 4 4 5 . 3
GBP
|
— |
| Assets less current liabilities [abstract] |