Statement Of Changes In Equity [Abstract]
| Concept |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||
| Statement of changes in equity [line items] | ||||||
| Increase (decrease) through exercise of options, equity | — | — | — |
100,000
GBP
|
100,000
GBP
|
-
GBP
|
| Decrease (increase) through tax on share-based payment transactions, equity |
-
GBP
|
500,000
GBP
|
500,000
GBP
|
300,000
GBP
|
300,000
GBP
|
-
GBP
|