Statement Of Changes In Equity [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 |
As at 2024-12-31 |
As at 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
2023-01-01 to 2023-12-31 |
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 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||||||||||||
| Equity | — | — | — | — |
1,100,000
GBP
|
431,900,000
GBP
|
— |
93,600,000
GBP
|
— |
200,000
GBP
|
200,000
GBP
|
–
GBP
|
— | — | — |
116,500,000
GBP
|
100,000
GBP
|
643,000,000
GBP
|
— | — |
636,600,000
GBP
|
— | — |
425,200,000
GBP
|
1,100,000
GBP
|
116,500,000
GBP
|
— | — | — |
93,600,000
GBP
|
— |
200,000
GBP
|
100,000
GBP
|
–
GBP
|
100,000
GBP
|
— |
627,100,000
GBP
|
116,500,000
GBP
|
93,600,000
GBP
|
1,100,000
GBP
|
415,700,000
GBP
|
–
GBP
|
200,000
GBP
|
–
GBP
|
–
GBP
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| Other comprehensive income |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — |
–
GBP
|
— |
100,000
GBP
|
— | — | — |
–
GBP
|
300,000
GBP
|
200,000
GBP
|
— | — | — |
–
GBP
|
–
GBP
|
— |
–
GBP
|
–
GBP
|
— | — | — |
–
GBP
|
–
GBP
|
100,000
GBP
|
— |
–
GBP
|
— | — | — | — |
100,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Comprehensive income |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — |
–
GBP
|
— |
100,000
GBP
|
— | — | — |
33,500,000
GBP
|
33,200,000
GBP
|
100,000
GBP
|
— | — | — |
–
GBP
|
38,500,000
GBP
|
— |
–
GBP
|
–
GBP
|
— | — | — |
38,500,000
GBP
|
–
GBP
|
100,000
GBP
|
— |
–
GBP
|
— | — | — | — |
100,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — |
–
GBP
|
— |
–
GBP
|
— | — | — |
30,800,000
GBP
|
30,800,000
GBP
|
–
GBP
|
— | — | — |
–
GBP
|
30,500,000
GBP
|
— |
–
GBP
|
–
GBP
|
— | — | — |
30,500,000
GBP
|
–
GBP
|
–
GBP
|
— |
–
GBP
|
— | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — |