Statement Of Comprehensive Income [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||
| Profit (loss) | — |
249,800,000
GBP
|
— | — | — | — | — |
81,900,000
GBP
|
— | — |
| Other comprehensive income [abstract] | ||||||||||
| Components of other comprehensive income that will not be reclassified to profit or loss, before tax [abstract] | ||||||||||
| Other comprehensive income, before tax, gains (losses) on revaluation of property, plant and equipment, right-of-use assets and intangible assets | — |
2,200,000
GBP
|
— | — | — | — | — |
1,900,000
GBP
|
— | — |
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss [abstract] | ||||||||||
| Income tax relating to changes in revaluation surplus of property, plant and equipment, right-of-use assets and intangible assets included in other comprehensive income | — |
600,000
GBP
|
— | — | — | — | — |
400,000
GBP
|
— | — |
| Other comprehensive income | — |
10,700,000
GBP
|
— | — | — | — | — |
30,000,000
GBP
|
— | — |
| Comprehensive income |
–
GBP
|
260,500,000
GBP
|
249,800,000
GBP
|
–
GBP
|
10,700,000
GBP
|
–
GBP
|
30,000,000
GBP
|
51,900,000
GBP
|
–
GBP
|
81,900,000
GBP
|