Statement Of Cash Flows [Abstract]
| Concept |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||||||||||
| Cash flows from (used in) operating activities [abstract] | ||||||||||||
| Profit (loss) |
–
GBP
|
140,200,000
GBP
|
— |
–
GBP
|
–
GBP
|
140,200,000
GBP
|
132,200,000
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
132,200,000
GBP
|
| Cash flows from (used in) operations | — |
804,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
753,300,000
GBP
|
| Cash flows from (used in) operating activities | — |
813,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
749,300,000
GBP
|
| Cash flows from (used in) investing activities [abstract] | ||||||||||||
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — |
41,500,000
GBP
|
— | — | — | — | — | — | — | — | — |
400,000
GBP
|
| Proceeds from sales of property, plant and equipment, classified as investing activities | — |
10,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
12,900,000
GBP
|
| Purchase of property, plant and equipment, classified as investing activities | — |
1,169,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
699,700,000
GBP
|
| Purchase of intangible assets, classified as investing activities | — |
30,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
40,000,000
GBP
|
| Cash receipts from repayment of advances and loans made to other parties, classified as investing activities | — |
2,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
5,500,000
GBP
|
| Interest received, classified as investing activities | — |
37,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
5,500,000
GBP
|
| Cash flows from (used in) investing activities | — |
1,191,500,000
GBP
|
— | — | — | — | — | — | — | — | — |
716,200,000
GBP
|
| Cash flows from (used in) financing activities [abstract] | ||||||||||||
| Proceeds from issuing shares | — |
1,000,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
15,300,000
GBP
|
| Payments to acquire or redeem entity's shares | — |
1,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,800,000
GBP
|
| Proceeds from borrowings, classified as financing activities | — |
1,469,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,351,400,000
GBP
|
| Repayments of borrowings, classified as financing activities | — |
603,600,000
GBP
|
— | — | — | — | — | — | — | — | — |
982,400,000
GBP
|
| Payments of lease liabilities, classified as financing activities | — |
10,500,000
GBP
|
— | — | — | — | — | — | — | — | — |
13,100,000
GBP
|
| Interest paid, classified as financing activities | — |
243,600,000
GBP
|
— | — | — | — | — | — | — | — | — |
205,300,000
GBP
|
| Cash flows from (used in) financing activities | — |
1,300,900,000
GBP
|
— | — | — | — | — | — | — | — | — |
112,100,000
GBP
|
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — |
922,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
79,000,000
GBP
|
| Cash and cash equivalents | — | — |
953,200,000
GBP
|
— | — | — | — |
34,200,000
GBP
|
— | — | — | — |