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 |
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) |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
24,600,000
GBP
|
24,600,000
GBP
|
–
GBP
|
–
GBP
|
15,500,000
GBP
|
15,500,000
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 | — | — | — | — |
4,700,000
GBP
|
— | — | — | — |
1,200,000
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 | — | — | — | — |
1,200,000
GBP
|
— | — | — | — |
300,000
GBP
|
— | — |
| Other comprehensive income |
–
GBP
|
–
GBP
|
3,700,000
GBP
|
–
GBP
|
7,200,000
GBP
|
3,500,000
GBP
|
–
GBP
|
7,700,000
GBP
|
900,000
GBP
|
8,600,000
GBP
|
–
GBP
|
–
GBP
|
| Comprehensive income |
–
GBP
|
–
GBP
|
3,700,000
GBP
|
–
GBP
|
17,400,000
GBP
|
21,100,000
GBP
|
–
GBP
|
7,700,000
GBP
|
14,600,000
GBP
|
6,900,000
GBP
|
–
GBP
|
–
GBP
|