Statement Of Cash Flows [Abstract]
| Concept |
2022-05-01 to 2023-04-30 |
2022-05-01 to 2023-04-30 |
2022-05-01 to 2023-04-30 |
2022-05-01 to 2023-04-30 |
2022-05-01 to 2023-04-30 |
2022-05-01 to 2023-04-30 |
As at 2023-04-30 |
2021-05-01 to 2022-04-30 |
2021-05-01 to 2022-04-30 |
2021-05-01 to 2022-04-30 |
2021-05-01 to 2022-04-30 |
2021-05-01 to 2022-04-30 |
As at 2022-04-30 |
2021-05-01 to 2022-04-30 |
As at 2021-04-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||||||||||
| Cash flows from (used in) operating activities [abstract] | |||||||||||||||
| Profit (loss) |
–
GBP
|
–
GBP
|
–
GBP
|
465,700,000
GBP
|
–
GBP
|
465,700,000
GBP
|
— |
482,400,000
GBP
|
–
GBP
|
–
GBP
|
482,400,000
GBP
|
–
GBP
|
— |
–
GBP
|
— |
| Cash flows from (used in) operations | — | — | — | — | — |
472,500,000
GBP
|
— | — | — | — |
37 2.4
GBP
|
— | — | — | — |
| Interest paid, classified as operating activities | — | — | — | — | — |
21,400,000
GBP
|
— | — | — | — |
5,600,000
GBP
|
— | — | — | — |
| Interest received, classified as operating activities | — | — | — | — | — |
18,200,000
GBP
|
— | — | — | — |
1,900,000
GBP
|
— | — | — | — |
| Income taxes paid (refund), classified as operating activities | — | — | — | — | — |
133. 7
GBP
|
— | — | — | — |
142,600,000
GBP
|
— | — | — | — |
| Cash flows from (used in) operating activities | — | — | — | — | — |
33 5.6
GBP
|
— | — | — | — |
129,500,000
GBP
|
— | — | — | — |
| Cash flows from (used in) investing activities [abstract] | |||||||||||||||
| Proceeds from sales of property, plant and equipment, classified as investing activities | — | — | — | — | — |
800,000
GBP
|
— | — | — | — |
300,000
GBP
|
— | — | — | — |
| Purchase of property, plant and equipment, classified as investing activities | — | — | — | — | — |
2,000,000
GBP
|
— | — | — | — |
1,300,000
GBP
|
— | — | — | — |
| Interest paid, classified as investing activities | — | — | — | — | — |
11,600,000
GBP
|
— | — | — | — |
26,700,000
GBP
|
— | — | — | — |
| Cash flows from (used in) investing activities | — | — | — | — | — |
62. 1
GBP
|
— | — | — | — |
27 .7
GBP
|
— | — | — | — |
| Cash flows from (used in) financing activities [abstract] | |||||||||||||||
| Payments to acquire or redeem entity's shares | — | — | — | — | — |
155,400,000
GBP
|
— | — | — | — |
63,700,000
GBP
|
— | — | — | — |
| Payments of lease liabilities, classified as financing activities | — | — | — | — | — |
2,300,000
GBP
|
— | — | — | — |
1,900,000
GBP
|
— | — | — | — |
| Cash flows from (used in) financing activities | — | — | — | — | — |
256,200,000
GBP
|
— | — | — | — |
342. 1
GBP
|
— | — | — | — |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — | — | — | — | — |
141,500,000
GBP
|
— | — | — | — |
499,300,000
GBP
|
— | — | — | — |
| Cash and cash equivalents | — | — | — | — | — | — |
1,070. 4
GBP
|
— | — | — | — | — |
928,900,000
GBP
|
— |
1,428,200,000
GBP
|