Analysis Of Income And Expense [Abstract]
| Concept |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||||||||||
| Revenue [abstract] | ||||||||||||||||||||||||
| Revenue |
2,248,100,000
GBP
|
–
GBP
|
2,248,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
2,034,100,000
GBP
|
–
GBP
|
— |
2,034,100,000
GBP
|
— | — | — | — | — | — | — |
| Miscellaneous other comprehensive income [abstract] | ||||||||||||||||||||||||
| Other comprehensive income, net of tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations [abstract] | ||||||||||||||||||||||||
| Other comprehensive income, net of tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations | — | — |
36,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
36,000,000
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 |
300,000
GBP
|
1,000,000
GBP
|
1,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
300,000
GBP
|
–
GBP
|
— |
300,000
GBP
|
— | — | — | — | — | — | — |
| Income tax relating to components of other comprehensive income [abstract] | ||||||||||||||||||||||||
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss | — | — |
7,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
3,000,000
GBP
|
— | — | — | — | — | — | — |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||||||||||
| Comprehensive income | — | — |
231,600,000
GBP
|
273,800,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
1,600,000
GBP
|
–
GBP
|
–
GBP
|
37,800,000
GBP
|
6,000,000
GBP
|
1,200,000
GBP
|
— | — |
1,900,000
GBP
|
220,700,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
259,800,000
GBP
|
–
GBP
|
36,000,000
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — |
231,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
220,700,000
GBP
|
— | — | — | — | — | — | — |
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | ||||||||||||||||||||||||
| Comprehensive income, attributable to non-controlling interests | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — |