Statement Of Changes In Equity [Abstract]
| Concept |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2022-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||
| Equity |
700. 8
GBP
|
— | — | — | — |
300,000
GBP
|
249. 8
GBP
|
6,000,000
GBP
|
— |
444. 7
GBP
|
4 59.9
GBP
|
181,400,000
GBP
|
6 4 7. 6
GBP
|
— | — |
300,000
GBP
|
— |
6,000,000
GBP
|
— | — |
152 .0
GBP
|
6 .0
GBP
|
300,000
GBP
|
633,300,000
GBP
|
47 5. 0
GBP
|
| Changes in equity [abstract] | |||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||
| Profit (loss) | — |
–
GBP
|
67,700,000
GBP
|
67,700,000
GBP
|
–
GBP
|
— | — | — |
–
GBP
|
— | — | — | — |
–
GBP
|
–
GBP
|
— |
–
GBP
|
— |
29. 2
GBP
|
2 9.2
GBP
|
— | — | — | — | — |
| Comprehensive income | — |
–
GBP
|
67,700,000
GBP
|
67,700,000
GBP
|
–
GBP
|
— | — | — |
–
GBP
|
— | — | — | — |
–
GBP
|
–
GBP
|
— |
–
GBP
|
— |
2 9.2
GBP
|
29. 2
GBP
|
— | — | — | — | — |
| Dividends recognised as distributions to owners | — |
–
GBP
|
15 . 2
GBP
|
–
GBP
|
15 . 2
GBP
|
— | — | — |
–
GBP
|
— | — | — | — |
–
GBP
|
15 .1
GBP
|
— |
–
GBP
|
— |
15 .1
GBP
|
–
GBP
|
— | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — |
–
GBP
|
0 .7
GBP
|
700,000
GBP
|
–
GBP
|
— | — | — |
–
GBP
|
— | — | — | — |
–
GBP
|
–
GBP
|
— |
–
GBP
|
— |
200,000
GBP
|
0. 2
GBP
|
— | — | — | — | — |