Analysis Of Income And Expense [Abstract]
| Concept |
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 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||
| Revenue [abstract] | ||||||||||||||
| Revenue | — | — | — |
2,942,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
2,982,300,000
GBP
|
| Miscellaneous other comprehensive income [abstract] | ||||||||||||||
| Other comprehensive income, before tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations [abstract] | ||||||||||||||
| Other comprehensive income, before tax, exchange differences on translation of foreign operations | — | — | — |
3,900,000
GBP
|
— | — | — | — | — | — | — | — | — |
43,100,000
GBP
|
| Share of profit (loss) of associates and joint ventures accounted for using equity method [abstract] | ||||||||||||||
| Share of profit (loss) of joint ventures accounted for using equity method | — | — | — |
600,000
GBP
|
— | — | — | — | — | — | — | — | — |
700,000
GBP
|
| Share of other comprehensive income of associates and joint ventures accounted for using equity method, before tax [abstract] | ||||||||||||||
| Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, before tax | — | — | — |
200,000
GBP
|
— | — | — | — | — | — | — | — | — |
100,000
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 | — | — | — |
100,000
GBP
|
— | — | — | — | — | — | — | — | — |
7,900,000
GBP
|
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — |
700,000
GBP
|
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||
| Comprehensive income |
100,000
GBP
|
700,000
GBP
|
183,700,000
GBP
|
183,600,000
GBP
|
–
GBP
|
–
GBP
|
184,400,000
GBP
|
–
GBP
|
310,100,000
GBP
|
258,500,000
GBP
|
51,600,000
GBP
|
–
GBP
|
–
GBP
|
310,100,000
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — |
183,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
310,100,000
GBP
|
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | ||||||||||||||
| Comprehensive income, attributable to non-controlling interests | — | — | — |
100,000
GBP
|
— | — | — | — | — | — | — | — | — |
–
GBP
|