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 |
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 |
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) |
4,300,000
GBP
|
300,000
GBP
|
–
GBP
|
54,700,000
GBP
|
–
GBP
|
50 .1
GBP
|
54,400,000
GBP
|
5 0 .1
GBP
|
28,900,000
GBP
|
–
GBP
|
0 .4
GBP
|
25,800,000
GBP
|
3 .1
GBP
|
28,900,000
GBP
|
60,600,000
GBP
|
35,200,000
GBP
|
–
GBP
|
| Other comprehensive income [abstract] | |||||||||||||||||
| Other comprehensive income |
–
GBP
|
— |
–
GBP
|
— |
2. 7
GBP
|
2,800,000
GBP
|
2,800,000
GBP
|
5,500,000
GBP
|
1. 1
GBP
|
–
GBP
|
— |
900,000
GBP
|
–
GBP
|
900,000
GBP
|
— | — |
0. 2
GBP
|
| Comprehensive income |
4,300,000
GBP
|
— |
–
GBP
|
— |
2. 7
GBP
|
52,900,000
GBP
|
5 7. 2
GBP
|
55,600,000
GBP
|
30,000,000
GBP
|
–
GBP
|
— |
26,700,000
GBP
|
3 .1
GBP
|
29,800,000
GBP
|
— | — |
0. 2
GBP
|
| Comprehensive income attributable to [abstract] | |||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — | — | — |
52,900,000
GBP
|
— | — | — | — |
29,800,000
GBP
|
— | — | — | — | — |
| Comprehensive income, attributable to non-controlling interests | — | — | — | — | — | — |
4,300,000
GBP
|
— | — | — | — |
3 .1
GBP
|
— | — | — | — | — |