Statement Of Comprehensive Income [Abstract]
| Concept |
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 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||||
| Profit (loss) |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
45,500,000
GBP
|
45,500,000
GBP
|
— | — | — | — | — | — |
| Other comprehensive income [abstract] | ||||||||||||
| Other comprehensive income |
200,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
200,000
GBP
|
–
GBP
|
— | — | — | — | — | — |
| Comprehensive income |
200,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
45,300,000
GBP
|
45,500,000
GBP
|
5,600,000
GBP
|
–
GBP
|
5,600,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
| Comprehensive income attributable to [abstract] | ||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — |
45,300,000
GBP
|
— | — | — |
5,600,000
GBP
|
— | — | — |