Statement Of Changes In Equity [Abstract]
| Concept |
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 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|
| 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
|
100,000
GBP
|
100,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
300,000
GBP
|
300,000
GBP
|
| Purchase of treasury shares |
5,600,000
GBP
|
–
GBP
|
5,600,000
GBP
|
–
GBP
|
–
GBP
|
4 . 6
GBP
|
–
GBP
|
–
GBP
|
4 .6
GBP
|
–
GBP
|
| Sale or issue of treasury shares |
1,500,000
GBP
|
–
GBP
|
200,000
GBP
|
1. 3
GBP
|
–
GBP
|
1,200,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
1. 2
GBP
|