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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||
| Increase (decrease) through transfer between revaluation surplus and retained earnings, equity | — | — | — | — | — | — | — |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
1,000,000
GBP
|
–
GBP
|
1,000,000
GBP
|
| Increase (decrease) through transactions with owners, equity |
–
GBP
|
61,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
1,000,000
GBP
|
61,000,000
GBP
|
–
GBP
|
–
GBP
|
71,000,000
GBP
|
1,000,000
GBP
|
72,000,000
GBP
|
–
GBP
|
–
GBP
|
| Purchase of treasury shares | — | — | — | — | — | — | — |
–
GBP
|
–
GBP
|
14,000,000
GBP
|
–
GBP
|
14,000,000
GBP
|
–
GBP
|
–
GBP
|