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 |
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 |
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] | ||||||||||||||
| Increase (decrease) through transfer to statutory reserve, equity |
–
GBP
|
–
GBP
|
–
GBP
|
23 . 9
GBP
|
–
GBP
|
–
GBP
|
23 . 9
GBP
|
–
GBP
|
–
GBP
|
17,600,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
17,600,000
GBP
|
| Increase (decrease) through exercise of options, equity |
600,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
0 .6
GBP
|
–
GBP
|
1,200,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
1,200,000
GBP
|
| Decrease (increase) through tax on share-based payment transactions, equity |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
1. 0
GBP
|
–
GBP
|
1. 0
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
400,000
GBP
|
400,000
GBP
|
| Purchase of treasury shares |
12 . 2
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
12 . 2
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
5,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
5,000,000
GBP
|
–
GBP
|
| Sale or issue of treasury shares |
400,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
0. 4
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
1,200,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
1,200,000
GBP
|
–
GBP
|
| Reduction of issued capital |
–
GBP
|
0. 2
GBP
|
–
GBP
|
–
GBP
|
4 0 .3
GBP
|
0 . 2
GBP
|
4 0. 3
GBP
|
— | — | — | — | — | — | — |