Statement Of Changes In Equity [Abstract]
| Concept |
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 |
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 |
2022-01-01 to 2022-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||
| Statement of changes in equity [line items] | ||||||||||
| Decrease (increase) through tax on share-based payment transactions, equity |
–
GBP
|
–
GBP
|
500,000
GBP
|
0. 5
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
100,000
GBP
|
100,000
GBP
|
–
GBP
|
| Purchase of treasury shares |
–
GBP
|
4,800,000
GBP
|
4,800,000
GBP
|
–
GBP
|
–
GBP
|
5,600,000
GBP
|
–
GBP
|
5,600,000
GBP
|
–
GBP
|
–
GBP
|
| Sale or issue of treasury shares |
–
GBP
|
3,600,000
GBP
|
200,000
GBP
|
3,400,000
GBP
|
–
GBP
|
1,500,000
GBP
|
–
GBP
|
200,000
GBP
|
1. 3
GBP
|
–
GBP
|