Statement Of Cash Flows [Abstract]
| Concept |
As at 2025-03-31 |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
2024-04-01 to 2025-03-31 |
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 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
As at 2023-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||||||||||||||||
| Cash flows from (used in) operating activities [abstract] | |||||||||||||||||||||
| Profit (loss) | — |
185,700,000
GBP
|
185,700,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
332,700,000
GBP
|
147,000,000
GBP
|
-
GBP
|
-
GBP
|
139,600,000
GBP
|
— |
-
GBP
|
-
GBP
|
-
GBP
|
30,000,000
GBP
|
169,600,000
GBP
|
139,600,000
GBP
|
-
GBP
|
— |
| Cash flows from (used in) operations | — |
286,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
294,100,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Interest paid, classified as operating activities | — |
23,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
19,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Interest received, classified as operating activities | — |
6,600,000
GBP
|
— | — | — | — | — | — | — | — | — |
5,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Income taxes paid (refund), classified as operating activities | — |
48,600,000
GBP
|
— | — | — | — | — | — | — | — | — |
36,900,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Cash flows from (used in) operating activities | — |
221,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
243,100,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Cash flows from (used in) investing activities [abstract] | |||||||||||||||||||||
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — |
-
GBP
|
— | — | — | — | — | — | — | — | — |
5,100,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Proceeds from sales of property, plant and equipment, classified as investing activities | — |
108,500,000
GBP
|
— | — | — | — | — | — | — | — | — |
2,100,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Purchase of property, plant and equipment, classified as investing activities | — |
96,100,000
GBP
|
— | — | — | — | — | — | — | — | — |
85,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Purchase of intangible assets, classified as investing activities | — |
12,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
10,900,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Cash flows from (used in) investing activities | — |
400,000
GBP
|
— | — | — | — | — | — | — | — | — |
99,100,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Cash flows from (used in) financing activities [abstract] | |||||||||||||||||||||
| Payments to acquire or redeem entity's shares | — |
108,900,000
GBP
|
— | — | — | — | — | — | — | — | — |
17,100,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Payments of lease liabilities, classified as financing activities | — |
10,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
6,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Cash flows from (used in) financing activities | — |
158,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
63,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — |
63,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
80,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||||||||||||||||||
| Effect of exchange rate changes on cash and cash equivalents | — |
3,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — |
18,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
55,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
290,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
231,000,000
GBP
|
— | — | — | — | — | — | — |
151,200,000
GBP
|