Statement Of Comprehensive Income [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 |
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 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||||||||||
| Profit (loss) |
14,283,000
GBP
|
–
GBP
|
33,764,000
GBP
|
326,255,000
GBP
|
374,302,000
GBP
|
340,538,000
GBP
|
–
GBP
|
–
GBP
|
326,255,000
GBP
|
334,022,000
GBP
|
375,674,000
GBP
|
28,872,000
GBP
|
334,022,000
GBP
|
–
GBP
|
12,780,000
GBP
|
–
GBP
|
–
GBP
|
346,802,000
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
|
— |
24,000
GBP
|
— |
24,000
GBP
|
–
GBP
|
–
GBP
|
24,000
GBP
|
2,811,000
GBP
|
— | — |
2,811,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
2,811,000
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
|
37,117,000
GBP
|
— |
37,117,000
GBP
|
— |
37,117,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
164,422,000
GBP
|
— | — |
–
GBP
|
164,422,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
164,422,000
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
|
— |
117,000
GBP
|
— |
117,000
GBP
|
— |
–
GBP
|
117,000
GBP
|
800,000
GBP
|
— | — |
800,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
800,000
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
|
6,937,000
GBP
|
— |
6,937,000
GBP
|
— |
6,937,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
30,374,000
GBP
|
— | — |
–
GBP
|
30,374,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
30,374,000
GBP
|
| Other comprehensive income | — | — | — | — | — |
36,120,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
88,757,000
GBP
|
| Comprehensive income |
11,732,000
GBP
|
33,476,000
GBP
|
— |
292,686,000
GBP
|
— |
304,418,000
GBP
|
–
GBP
|
–
GBP
|
326,162,000
GBP
|
243,242,000
GBP
|
— | — |
336,033,000
GBP
|
92,791,000
GBP
|
14,803,000
GBP
|
–
GBP
|
–
GBP
|
258,045,000
GBP
|
| Comprehensive income attributable to [abstract] | ||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — | — |
292,686,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
243,242,000
GBP
|
| Comprehensive income, attributable to non-controlling interests | — | — | — | — | — |
11,732,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
14,803,000
GBP
|