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
|
— |
19,200,000
GBP
|
19,200,000
GBP
|
19,200,000
GBP
|
20,300,000
GBP
|
–
GBP
|
20,300,000
GBP
|
–
GBP
|
–
GBP
|
20,300,000
GBP
|
| Other comprehensive income [abstract] | ||||||||||||
| Other comprehensive income |
–
GBP
|
–
GBP
|
100,000
GBP
|
100,000
GBP
|
100,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
100,000
GBP
|
100,000
GBP
|
–
GBP
|
100,000
GBP
|
| Comprehensive income |
–
GBP
|
–
GBP
|
100,000
GBP
|
19,100,000
GBP
|
19,100,000
GBP
|
19,200,000
GBP
|
20,300,000
GBP
|
–
GBP
|
20,400,000
GBP
|
100,000
GBP
|
–
GBP
|
20,400,000
GBP
|