Statement Of Comprehensive Income [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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||||||||||
| Profit (loss) |
14,731,000
GBP
|
166,720,000
GBP
|
387,941,000
GBP
|
–
GBP
|
206,490,000
GBP
|
–
GBP
|
221,221,000
GBP
|
–
GBP
|
206,490,000
GBP
|
14,283,000
GBP
|
–
GBP
|
326,255,000
GBP
|
326,255,000
GBP
|
374,302,000
GBP
|
33,764,000
GBP
|
340,538,000
GBP
|
–
GBP
|
–
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
|
— | — |
–
GBP
|
332,000
GBP
|
–
GBP
|
332,000
GBP
|
–
GBP
|
332,000
GBP
|
–
GBP
|
–
GBP
|
24,000
GBP
|
24,000
GBP
|
— | — |
24,000
GBP
|
–
GBP
|
–
GBP
|
| Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract] | ||||||||||||||||||
| Cash flow hedges [abstract] | ||||||||||||||||||
| Other comprehensive income, before tax, cash flow hedges |
–
GBP
|
— | — |
–
GBP
|
25,323,000
GBP
|
–
GBP
|
25,323,000
GBP
|
25,323,000
GBP
|
–
GBP
|
–
GBP
|
37,117,000
GBP
|
–
GBP
|
37,117,000
GBP
|
— | — |
37,117,000
GBP
|
–
GBP
|
–
GBP
|
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss [abstract] | ||||||||||||||||||
| Income tax relating to remeasurements of defined benefit plans included in other comprehensive income |
–
GBP
|
— | — |
–
GBP
|
28,000
GBP
|
–
GBP
|
28,000
GBP
|
–
GBP
|
28,000
GBP
|
–
GBP
|
–
GBP
|
117,000
GBP
|
117,000
GBP
|
— | — |
117,000
GBP
|
— |
–
GBP
|
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss [abstract] | ||||||||||||||||||
| Income tax relating to cash flow hedges included in other comprehensive income |
–
GBP
|
— | — |
–
GBP
|
5,140,000
GBP
|
–
GBP
|
5,140,000
GBP
|
5,140,000
GBP
|
–
GBP
|
–
GBP
|
6,937,000
GBP
|
–
GBP
|
6,937,000
GBP
|
— | — |
6,937,000
GBP
|
–
GBP
|
–
GBP
|
| Other comprehensive income | — | — | — | — | — | — |
36,851,000
GBP
|
— | — | — | — | — | — | — | — |
36,120,000
GBP
|
— | — |
| Comprehensive income |
12,550,000
GBP
|
— | — |
–
GBP
|
171,820,000
GBP
|
–
GBP
|
184,370,000
GBP
|
34,366,000
GBP
|
206,186,000
GBP
|
11,732,000
GBP
|
33,476,000
GBP
|
326,162,000
GBP
|
292,686,000
GBP
|
— | — |
304,418,000
GBP
|
–
GBP
|
–
GBP
|
| Comprehensive income attributable to [abstract] | ||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — | — | — |
171,820,000
GBP
|
— | — | — | — | — | — | — | — |
292,686,000
GBP
|
— | — |
| Comprehensive income, attributable to non-controlling interests | — | — | — | — | — | — |
12,550,000
GBP
|
— | — | — | — | — | — | — | — |
11,732,000
GBP
|
— | — |