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 |
|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||
| Cash flows from (used in) operating activities [abstract] | ||||
| Cash flows from (used in) operations | — |
357,400,000
GBP
|
374,300,000
GBP
|
— |
| Interest paid, classified as operating activities | — |
55,800,000
GBP
|
54. 3
GBP
|
— |
| Interest received, classified as operating activities | — |
29,000,000
GBP
|
22,100,000
GBP
|
— |
| Income taxes paid (refund), classified as operating activities | — |
21,800,000
GBP
|
27,400,000
GBP
|
— |
| Cash flows from (used in) operating activities | — |
308,800,000
GBP
|
314,700,000
GBP
|
— |
| Cash flows from (used in) investing activities [abstract] | ||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities | — |
1,100,000
GBP
|
1,300,000
GBP
|
— |
| Proceeds from sales of property, plant and equipment, classified as investing activities | — |
6,100,000
GBP
|
30,600,000
GBP
|
— |
| Purchase of property, plant and equipment, classified as investing activities | — |
105,300,000
GBP
|
109,700,000
GBP
|
— |
| Purchase of intangible assets, classified as investing activities | — |
23,000,000
GBP
|
32,700,000
GBP
|
— |
| Cash advances and loans made to other parties, classified as investing activities | — |
–
GBP
|
2,100,000
GBP
|
— |
| Cash receipts from repayment of advances and loans made to other parties, classified as investing activities | — |
300,000
GBP
|
7,500,000
GBP
|
— |
| Dividends received, classified as investing activities | — |
12,200,000
GBP
|
7,100,000
GBP
|
— |
| Cash flows from (used in) investing activities | — |
110 .8
GBP
|
100,600,000
GBP
|
— |
| Cash flows from (used in) financing activities [abstract] | ||||
| Payments to acquire or redeem entity's shares | — |
18,800,000
GBP
|
12,500,000
GBP
|
— |
| Proceeds from borrowings, classified as financing activities | — |
7,900,000
GBP
|
–
GBP
|
— |
| Repayments of borrowings, classified as financing activities | — |
8,400,000
GBP
|
13,100,000
GBP
|
— |
| Payments of lease liabilities, classified as financing activities | — |
45,400,000
GBP
|
49,600,000
GBP
|
— |
| Cash flows from (used in) financing activities | — |
92,700,000
GBP
|
85,500,000
GBP
|
— |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — |
105,300,000
GBP
|
128,600,000
GBP
|
— |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | ||||
| Effect of exchange rate changes on cash and cash equivalents | — |
11,400,000
GBP
|
5,500,000
GBP
|
— |
| Cash and cash equivalents |
646,600,000
GBP
|
— | — |
570,600,000
GBP
|