Analysis Of Income And Expense [Abstract]
| Concept |
2024-04-01 to 2025-03-30 |
2024-04-01 to 2025-03-30 |
2024-04-01 to 2025-03-30 |
2024-04-01 to 2025-03-30 |
2024-04-01 to 2025-03-30 |
2024-04-01 to 2025-03-30 |
2024-04-01 to 2025-03-30 |
2024-04-01 to 2025-03-30 |
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 | — | — | — | — | — | — |
787 .6
GBP
|
— | — | — |
877 .1
GBP
|
— | — | — | — | — |
| Material income and expense [abstract] | ||||||||||||||||
| Finance income (cost) | — | — | — | — | — | — |
28,200,000
GBP
|
— | — | — |
29,200,000
GBP
|
— | — | — | — | — |
| Selling, general and administrative expense [abstract] | ||||||||||||||||
| Selling, general and administrative expense | — | — | — | — | — | — |
474,700,000
GBP
|
— | — | — |
453,000,000
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 | — | — | — | — | — | — |
3,100,000
GBP
|
— | — | — |
2,800,000
GBP
|
— | — | — | — | — |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||
| Comprehensive income |
3,800,000
GBP
|
3,100,000
GBP
|
–
GBP
|
–
GBP
|
200,000
GBP
|
–
GBP
|
500,000
GBP
|
–
GBP
|
–
GBP
|
2,800,000
GBP
|
68,300,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
1,400,000
GBP
|
69,700,000
GBP
|