Statement Of Changes In Equity [Abstract]
| Concept |
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 |
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 |
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 |
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 |
2023-01-01 to 2023-12-31 |
As at 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||
| Equity | — | — |
236,500,000
GBP
|
2,935,700,000
GBP
|
— |
25,600,000
GBP
|
32,000,000
GBP
|
— | — | — |
27 6.8
GBP
|
3,506,600,000
GBP
|
— |
3,4 1 8.5
GBP
|
— |
2,847 .7
GBP
|
2 36.5
GBP
|
— | — |
25,600,000
GBP
|
— |
31 . 9
GBP
|
— |
2 7 6.8
GBP
|
3,439,300,000
GBP
|
25,600,000
GBP
|
2 36.5
GBP
|
2,868,500,000
GBP
|
31 . 9
GBP
|
2 7 6.8
GBP
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||
| Profit (loss) |
—
GBP
|
—
GBP
|
— | — |
—
GBP
|
— | — |
2 6 7. 1
GBP
|
2 6 7. 1
GBP
|
—
GBP
|
— | — |
2 55.4
GBP
|
— |
—
GBP
|
— | — |
255,400,000
GBP
|
—
GBP
|
— |
—
GBP
|
— |
—
GBP
|
— | — | — | — | — | — | — |
| Other comprehensive income |
—
GBP
|
—
GBP
|
— | — |
—
GBP
|
— | — |
1,100,000
GBP
|
1 .1
GBP
|
—
GBP
|
— | — |
25,300,000
GBP
|
— |
—
GBP
|
— | — |
25,300,000
GBP
|
—
GBP
|
— |
—
GBP
|
— |
—
GBP
|
— | — | — | — | — | — | — |
| Comprehensive income | — | — | — | — | — | — | — | — |
266,000,000
GBP
|
— | — | — |
2 30.1
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Issue of equity |
100,000
GBP
|
—
GBP
|
— | — |
—
GBP
|
— | — |
—
GBP
|
100,000
GBP
|
—
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
—
GBP
|
—
GBP
|
— | — |
—
GBP
|
— | — |
1 9 1 .8
GBP
|
1 9 1 .8
GBP
|
—
GBP
|
— | — |
255,400,000
GBP
|
— |
—
GBP
|
— | — |
255,400,000
GBP
|
—
GBP
|
— |
—
GBP
|
— |
—
GBP
|
— | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
—
GBP
|
—
GBP
|
— | — |
—
GBP
|
— | — |
1 4.0
GBP
|
1 4.0
GBP
|
—
GBP
|
— | — |
5,700,000
GBP
|
— |
—
GBP
|
— | — |
5,700,000
GBP
|
—
GBP
|
— |
—
GBP
|
— |
—
GBP
|
— | — | — | — | — | — | — |