Statement Of Comprehensive Income [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 |
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 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||||||||||
| Profit (loss) |
–
GBP
|
–
GBP
|
182,800,000
GBP
|
184,200,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
182,800,000
GBP
|
1,400,000
GBP
|
1,200,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
185,300,000
GBP
|
186,500,000
GBP
|
185,300,000
GBP
|
| Other comprehensive income [abstract] | ||||||||||||||||||
| Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract] | ||||||||||||||||||
| Cash flow hedges [abstract] | ||||||||||||||||||
| Other comprehensive income, before tax, cash flow hedges | — | — | — |
2,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
900,000
GBP
|
— |
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss [abstract] | ||||||||||||||||||
| Income tax relating to cash flow hedges included in other comprehensive income | — | — | — |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
200,000
GBP
|
— |
| Other comprehensive income |
–
GBP
|
–
GBP
|
47,100,000
GBP
|
47,700,000
GBP
|
–
GBP
|
–
GBP
|
45,300,000
GBP
|
1,800,000
GBP
|
600,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
10,300,000
GBP
|
9,100,000
GBP
|
9,100,000
GBP
|
1,200,000
GBP
|
| Comprehensive income |
–
GBP
|
–
GBP
|
229,900,000
GBP
|
231,900,000
GBP
|
–
GBP
|
–
GBP
|
45,300,000
GBP
|
184,600,000
GBP
|
2,000,000
GBP
|
1,200,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
10,300,000
GBP
|
176,200,000
GBP
|
177,400,000
GBP
|
186,500,000
GBP
|
| Comprehensive income attributable to [abstract] | ||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — |
229,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
176,200,000
GBP
|
— |
| Comprehensive income, attributable to non-controlling interests | — | — | — |
2,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
1,200,000
GBP
|
— |