Statement Of Cash Flows [Abstract]
| Concept |
2023-03-01 to 2024-04-30 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
As at 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2022-04-01 to 2023-03-31 |
As at 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 |
As at 2022-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||||||||
| Cash flows from (used in) operating activities [abstract] | |||||||||||||
| Profit (loss) |
28,800,000
GBP
|
–
GBP
|
28,800,000
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
— |
119,200,000
GBP
|
–
GBP
|
–
GBP
|
119,200,000
GBP
|
— |
| Interest paid, classified as operating activities | — | — |
29,300,000
GBP
|
— | — | — | — | — | — | — | — |
29,000,000
GBP
|
— |
| Interest received, classified as operating activities | — | — |
2,100,000
GBP
|
— | — | — | — | — | — | — | — |
1,600,000
GBP
|
— |
| Other inflows (outflows) of cash, classified as operating activities | — | — |
19,000,000
GBP
|
— | — | — | — | — | — | — | — |
18,000,000
GBP
|
— |
| Cash flows from (used in) operating activities | — | — |
102,400,000
GBP
|
— | — | — | — | — | — | — | — |
94,100,000
GBP
|
— |
| Cash flows from (used in) investing activities [abstract] | |||||||||||||
| Proceeds from sales of property, plant and equipment, classified as investing activities | — | — |
3,400,000
GBP
|
— | — | — | — | — | — | — | — |
77,800,000
GBP
|
— |
| Cash flows from (used in) investing activities | — | — |
97,700,000
GBP
|
— | — | — | — | — | — | — | — |
130,400,000
GBP
|
— |
| Cash flows from (used in) financing activities [abstract] | |||||||||||||
| Dividends paid, classified as financing activities | — | — |
85,500,000
GBP
|
— | — | — | — | — | — | — | — |
88,900,000
GBP
|
— |
| Cash flows from (used in) financing activities | — | — |
87,300,000
GBP
|
— | — | — | — | — | — | — | — |
89,200,000
GBP
|
— |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — | — |
82,600,000
GBP
|
— | — | — | — | — | — | — | — |
125,500,000
GBP
|
— |
| Cash and cash equivalents | — | — | — |
35,400,000
GBP
|
— | — | — |
118,000,000
GBP
|
— | — | — | — |
243,500,000
GBP
|