Statement Of Comprehensive Income [Abstract]
| Concept |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
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 |
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 |
2023-01-01 to 2023-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||||||||||||
| Profit (loss) |
–
GBP
|
297,700,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
297,700,000
GBP
|
68,700,000
GBP
|
366,400,000
GBP
|
737,200,000
GBP
|
370,800,000
GBP
|
462,700,000
GBP
|
419,000,000
GBP
|
–
GBP
|
43,700,000
GBP
|
419,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
678,200,000
GBP
|
215,500,000
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 remeasurements of defined benefit plans |
–
GBP
|
1,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
1,000,000
GBP
|
–
GBP
|
1,000,000
GBP
|
— | — |
11,800,000
GBP
|
11,800,000
GBP
|
–
GBP
|
–
GBP
|
11,800,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — |
| Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract] | ||||||||||||||||||||
| Exchange differences on translation [abstract] | ||||||||||||||||||||
| Gains (losses) on exchange differences on translation of foreign operations, before tax |
–
GBP
|
91,600,000
GBP
|
–
GBP
|
–
GBP
|
91,600,000
GBP
|
–
GBP
|
3,000,000
GBP
|
94,600,000
GBP
|
— | — |
351,500,000
GBP
|
349,800,000
GBP
|
–
GBP
|
1,700,000
GBP
|
–
GBP
|
–
GBP
|
349,800,000
GBP
|
–
GBP
|
— | — |
| Cash flow hedges [abstract] | ||||||||||||||||||||
| Gains (losses) on cash flow hedges, before tax | — | — | — | — | — | — | — |
49,300,000
GBP
|
— | — |
28,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Reclassification adjustments on cash flow hedges, before tax | — | — | — | — | — | — | — |
62,500,000
GBP
|
— | — |
34,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Cost of hedging [abstract] | ||||||||||||||||||||
| Change in value of foreign currency basis spreads [abstract] | ||||||||||||||||||||
| Gains (losses) on change in value of foreign currency basis spreads, before tax | — | — | — | — | — | — | — |
1,200,000
GBP
|
— | — |
6,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss [abstract] | ||||||||||||||||||||
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss | — | — | — | — | — | — | — |
4,400,000
GBP
|
— | — |
1,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — |
7,500,000
GBP
|
— | — |
265,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Comprehensive income |
12,000,000
GBP
|
302,200,000
GBP
|
–
GBP
|
–
GBP
|
6,500,000
GBP
|
296,700,000
GBP
|
71,700,000
GBP
|
373,900,000
GBP
|
— | — |
197,400,000
GBP
|
155,400,000
GBP
|
700,000
GBP
|
42,000,000
GBP
|
407,200,000
GBP
|
–
GBP
|
251,100,000
GBP
|
–
GBP
|
— | — |
| Comprehensive income attributable to [abstract] | ||||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — | — | — | — |
302,200,000
GBP
|
— | — |
155,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Comprehensive income, attributable to non-controlling interests | — | — | — | — | — | — | — |
71,700,000
GBP
|
— | — |
42,000,000
GBP
|
— | — | — | — | — | — | — | — | — |