Statement Of Cash Flows [Abstract]
| Concept |
2024-04-01 to 2025-03-30 |
2024-04-01 to 2025-03-30 |
As at 2025-03-30 |
2024-04-01 to 2025-03-30 |
2024-04-01 to 2025-03-30 |
2024-04-01 to 2025-03-30 |
2024-04-01 to 2025-03-30 |
2024-04-01 to 2025-03-30 |
2024-04-01 to 2025-03-30 |
2023-04-01 to 2024-03-31 |
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 |
As at 2023-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||||||||||||||
| Cash flows from (used in) operating activities [abstract] | |||||||||||||||||||
| Profit (loss) |
4,500,000
GBP
|
–
GBP
|
— |
4,500,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
69,200,000
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
69,200,000
GBP
|
–
GBP
|
— |
| Adjustments to reconcile profit (loss) [abstract] | |||||||||||||||||||
| Adjustments for income tax expense |
4,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
23,800,000
GBP
|
— | — | — | — | — | — | — |
| Adjustments for finance costs |
32,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
32,200,000
GBP
|
— | — | — | — | — | — | — |
| Adjustments for decrease (increase) in inventories |
62,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
1,600,000
GBP
|
— | — | — | — | — | — | — |
| Adjustments for depreciation and amortisation expense |
76,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
72,300,000
GBP
|
— | — | — | — | — | — | — |
| Adjustments for unrealised foreign exchange losses (gains) |
3,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
4,200,000
GBP
|
— | — | — | — | — | — | — |
| Adjustments for share-based payments |
7. 2
GBP
|
— | — | — | — | — | — | — | — | — | — |
4,000,000
GBP
|
— | — | — | — | — | — | — |
| Other adjustments to reconcile profit (loss) |
100,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
1,200,000
GBP
|
— | — | — | — | — | — | — |
| Cash flows from (used in) operations |
204,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
185,200,000
GBP
|
— | — | — | — | — | — | — |
| Income taxes paid (refund), classified as operating activities |
12,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
18,800,000
GBP
|
— | — | — | — | — | — | — |
| Cash flows from (used in) operating activities |
196,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
167 .9
GBP
|
— | — | — | — | — | — | — |
| Cash flows from (used in) investing activities [abstract] | |||||||||||||||||||
| Purchase of property, plant and equipment, classified as investing activities |
8,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
18,200,000
GBP
|
— | — | — | — | — | — | — |
| Purchase of intangible assets, classified as investing activities |
10,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
10,200,000
GBP
|
— | — | — | — | — | — | — |
| Interest received, classified as investing activities |
3,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
2,900,000
GBP
|
— | — | — | — | — | — | — |
| Cash flows from (used in) investing activities |
15,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
25,500,000
GBP
|
— | — | — | — | — | — | — |
| Cash flows from (used in) financing activities [abstract] | |||||||||||||||||||
| Payments to acquire or redeem entity's shares |
–
GBP
|
— | — | — | — | — | — | — | — | — | — |
50,500,000
GBP
|
— | — | — | — | — | — | — |
| Proceeds from borrowings, classified as financing activities |
250,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — |
| Repayments of borrowings, classified as financing activities |
283,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — |
| Payments of lease liabilities, classified as financing activities |
49,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
43,600,000
GBP
|
— | — | — | — | — | — | — |
| Dividends paid, classified as financing activities |
9,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
57 .8
GBP
|
— | — | — | — | — | — | — |
| Interest paid, classified as financing activities |
31,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
19,900,000
GBP
|
— | — | — | — | — | — | — |
| Cash flows from (used in) financing activities |
134,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
185,900,000
GBP
|
— | — | — | — | — | — | — |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes |
46,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
43,500,000
GBP
|
— | — | — | — | — | — | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||||||||||||||||
| Effect of exchange rate changes on cash and cash equivalents |
2,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
2,900,000
GBP
|
— | — | — | — | — | — | — |
| Cash and cash equivalents | — | — |
155,900,000
GBP
|
— | — | — | — | — | — | — | — | — |
111,100,000
GBP
|
— | — | — | — | — |
157 .5
GBP
|