Analysis Of Income And Expense [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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||||||
| Revenue [abstract] | ||||||||||||||||||||
| Revenue | — | — | — | — | — | — | — |
3,553,100,000
GBP
|
3,553,100,000
GBP
|
–
GBP
|
3,189,600,000
GBP
|
— | — | — | — | — | — | — |
3,189,600,000
GBP
|
–
GBP
|
| Material income and expense [abstract] | ||||||||||||||||||||
| Gains (losses) on disposals of investments [abstract] | ||||||||||||||||||||
| Gains (losses) on disposals of investments | — | — | — | — | — | — | — |
24,100,000
GBP
|
–
GBP
|
24,100,000
GBP
|
3,000,000
GBP
|
— | — | — | — | — | — | — |
–
GBP
|
3,000,000
GBP
|
| Miscellaneous other operating income | — | — | — | — | — | — | — |
29,500,000
GBP
|
–
GBP
|
29,500,000
GBP
|
87,600,000
GBP
|
— | — | — | — | — | — | — |
–
GBP
|
87,600,000
GBP
|
| Share of profit (loss) of associates and joint ventures accounted for using equity method [abstract] | ||||||||||||||||||||
| Share of profit (loss) of associates and joint ventures accounted for using equity method | — | — | — | — | — | — | — |
1,300,000
GBP
|
2,800,000
GBP
|
1,500,000
GBP
|
4,300,000
GBP
|
— | — | — | — | — | — | — |
5,800,000
GBP
|
1,500,000
GBP
|
| Income tax relating to components of other comprehensive income [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
|
— | — | — | — | — | — | — | — | — |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||||||
| 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 owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — | — | — | — |
302,200,000
GBP
|
— | — |
155,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | ||||||||||||||||||||
| Comprehensive income, attributable to non-controlling interests | — | — | — | — | — | — | — |
71,700,000
GBP
|
— | — |
42,000,000
GBP
|
— | — | — | — | — | — | — | — | — |