Statement Of Cash Flows [Abstract]
| Concept |
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 2021-05-01 |
2020-05-01 to 2021-04-30 |
2020-05-01 to 2021-04-30 |
2020-05-01 to 2021-04-30 |
2020-05-01 to 2021-04-30 |
2020-05-01 to 2021-04-30 |
2020-05-01 to 2021-04-30 |
As at 2021-04-30 |
As at 2020-05-01 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||||||||||||||
| Cash flows from (used in) operating activities [abstract] | ||||||||||||||||
| Profit (loss) |
482,400,000
GBP
|
–
GBP
|
–
GBP
|
482,400,000
GBP
|
–
GBP
|
— |
–
GBP
|
— |
–
GBP
|
–
GBP
|
422. 7
GBP
|
422,700,000
GBP
|
–
GBP
|
–
GBP
|
— | — |
| Cash flows from (used in) operations | — | — | — |
372,400,000
GBP
|
— | — | — | — | — | — |
419,400,000
GBP
|
— | — | — | — | — |
| Interest paid, classified as operating activities | — | — | — |
5,600,000
GBP
|
— | — | — | — | — | — |
8. 1
GBP
|
— | — | — | — | — |
| Interest received, classified as operating activities | — | — | — |
1,900,000
GBP
|
— | — | — | — | — | — |
3,000,000
GBP
|
— | — | — | — | — |
| Other inflows (outflows) of cash, classified as operating activities | — | — | — |
355,600,000
GBP
|
— | — | — | — | — | — |
–
GBP
|
— | — | — | — | — |
| Cash flows from (used in) operating activities | — | — | — |
129,500,000
GBP
|
— | — | — | — | — | — |
324,200,000
GBP
|
— | — | — | — | — |
| Cash flows from (used in) investing activities [abstract] | ||||||||||||||||
| Purchase of property, plant and equipment, classified as investing activities | — | — | — |
1,300,000
GBP
|
— | — | — | — | — | — |
2,400,000
GBP
|
— | — | — | — | — |
| Cash flows from (used in) investing activities | — | — | — |
27 .7
GBP
|
— | — | — | — | — | — |
0. 9
GBP
|
— | — | — | — | — |
| Cash flows from (used in) financing activities [abstract] | ||||||||||||||||
| Proceeds from issuing shares | — | — | — |
–
GBP
|
— | — | — | — | — | — |
100,000
GBP
|
— | — | — | — | — |
| Proceeds from borrowings, classified as financing activities | — | — | — |
2 60.0
GBP
|
— | — | — | — | — | — |
–
GBP
|
— | — | — | — | — |
| Repayments of borrowings, classified as financing activities | — | — | — |
300,000,000
GBP
|
— | — | — | — | — | — |
200. 0
GBP
|
— | — | — | — | — |
| Payments of lease liabilities, classified as financing activities | — | — | — |
1,900,000
GBP
|
— | — | — | — | — | — |
1,800,000
GBP
|
— | — | — | — | — |
| Other inflows (outflows) of cash, classified as financing activities | — | — | — |
451,500,000
GBP
|
— | — | — | — | — | — |
–
GBP
|
— | — | — | — | — |
| Cash flows from (used in) financing activities | — | — | — |
342. 1
GBP
|
— | — | — | — | — | — |
535,800,000
GBP
|
— | — | — | — | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — | — | — |
499,300,000
GBP
|
— | — | — | — | — | — |
210. 7
GBP
|
— | — | — | — | — |
| Cash and cash equivalents | — | — | — | — | — |
928,900,000
GBP
|
— |
1,428,000
GBP
|
— | — | — | — | — | — |
1,428,200,000
GBP
|
1,638,900,000
GBP
|