Statement Of Cash Flows [Abstract]
| Concept |
As at 2025-03-31 |
2024-04-01 to 2025-03-31 |
2023-04-01 to 2024-03-31 |
As at 2024-03-31 |
As at 2023-03-31 |
|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||
| Cash flows from (used in) operating activities [abstract] | |||||
| Cash flows from (used in) operations | — |
233,600,000
GBP
|
261,700,000
GBP
|
— | — |
| Interest paid, classified as operating activities | — |
143,100,000
GBP
|
116,200,000
GBP
|
— | — |
| Income taxes paid (refund), classified as operating activities | — |
3,000,000
GBP
|
3,400,000
GBP
|
— | — |
| Cash flows from (used in) operating activities | — |
93,500,000
GBP
|
148,900,000
GBP
|
— | — |
| Cash flows from (used in) investing activities [abstract] | |||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities | — |
20,800,000
GBP
|
4,300,000
GBP
|
— | — |
| Proceeds from sales of property, plant and equipment, classified as investing activities | — |
1,900,000
GBP
|
800,000
GBP
|
— | — |
| Purchase of property, plant and equipment, classified as investing activities | — |
663,100,000
GBP
|
555,100,000
GBP
|
— | — |
| Purchase of intangible assets, classified as investing activities | — |
5,500,000
GBP
|
43,800,000
GBP
|
— | — |
| Interest received, classified as investing activities | — |
11,100,000
GBP
|
7,100,000
GBP
|
— | — |
| Cash flows from (used in) investing activities | — |
676,400,000
GBP
|
658,000,000
GBP
|
— | — |
| Cash flows from (used in) financing activities [abstract] | |||||
| Proceeds from issuing shares | — |
491,000,000
GBP
|
175,700,000
GBP
|
— | — |
| Proceeds from borrowings, classified as financing activities | — |
920,000,000
GBP
|
574,500,000
GBP
|
— | — |
| Repayments of borrowings, classified as financing activities | — |
328,500,000
GBP
|
168,700,000
GBP
|
— | — |
| Payments of lease liabilities, classified as financing activities | — |
97,200,000
GBP
|
22,400,000
GBP
|
— | — |
| Dividends paid, classified as financing activities | — |
126,900,000
GBP
|
111,700,000
GBP
|
— | — |
| Cash flows from (used in) financing activities | — |
866,800,000
GBP
|
510,800,000
GBP
|
— | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — |
283,900,000
GBP
|
1,700,000
GBP
|
— | — |
| Cash and cash equivalents |
417,900,000
GBP
|
— | — |
134,000,000
GBP
|
132,300,000
GBP
|