Analysis Of Income And Expense [Abstract]
| Concept |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||
| Revenue [abstract] | ||||||||||||||||
| Revenue | — |
9 7 7.1
GBP
|
— | — | — | — | — | — | — |
96 3.5
GBP
|
— | — | — | — | — | — |
| Material income and expense [abstract] | ||||||||||||||||
| Investment income | — |
10 . 6
GBP
|
— | — | — | — | — | — | — |
10 .1
GBP
|
— | — | — | — | — | — |
| Trading income (expense) [abstract] | ||||||||||||||||
| Trading income (expense) | — |
39,000,000
GBP
|
— | — | — | — | — | — | — |
36,900,000
GBP
|
— | — | — | — | — | — |
| Share of profit (loss) of associates and joint ventures accounted for using equity method [abstract] | ||||||||||||||||
| Share of profit (loss) of joint ventures accounted for using equity method | — |
1. 3
GBP
|
— | — | — | — | — | — | — |
1. 0
GBP
|
— | — | — | — | — | — |
| Income tax relating to components of other comprehensive income [abstract] | ||||||||||||||||
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss | — |
1 .1
GBP
|
— | — | — | — | — | — | — |
600,000
GBP
|
— | — | — | — | — | — |
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss | — |
800,000
GBP
|
— | — | — | — | — | — | — |
900,000
GBP
|
— | — | — | — | — | — |
| Income tax relating to components of other comprehensive income |
–
GBP
|
1. 9
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
800,000
GBP
|
–
GBP
|
1 .1
GBP
|
–
GBP
|
300,000
GBP
|
–
GBP
|
–
GBP
|
900,000
GBP
|
600,000
GBP
|
–
GBP
|
–
GBP
|
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||
| Comprehensive income |
–
GBP
|
2 4 .1
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
2 .1
GBP
|
4 .0
GBP
|
2 2 . 2
GBP
|
–
GBP
|
1 4.9
GBP
|
–
GBP
|
–
GBP
|
2,700,000
GBP
|
2 9 .1
GBP
|
–
GBP
|
16 . 9
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||
| Comprehensive income, attributable to owners of parent | — |
2 4 .1
GBP
|
— | — | — | — | — | — | — |
1 4.9
GBP
|
— | — | — | — | — | — |