Statement Of Cash Flows [Abstract]
| Concept |
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 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 |
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 |
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 |
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
|
–
GBP
|
165,700,000
GBP
|
168,200,000
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
165,700,000
GBP
|
2,500,000
GBP
|
–
GBP
|
–
GBP
|
35,000,000
GBP
|
–
GBP
|
–
GBP
|
— |
–
GBP
|
–
GBP
|
35,000,000
GBP
|
–
GBP
|
1,700,000
GBP
|
33,300,000
GBP
|
| Adjustments to reconcile profit (loss) [abstract] | ||||||||||||||||||||||
| Adjustments for income tax expense | — | — | — |
48,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
39,500,000
GBP
|
| Adjustments for finance costs | — | — | — |
56,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
70,500,000
GBP
|
| Adjustments for decrease (increase) in inventories | — | — | — |
67,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
25,700,000
GBP
|
| Adjustments for provisions | — | — | — |
8,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
47,900,000
GBP
|
| Adjustments for share-based payments | — | — | — |
12,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
9,400,000
GBP
|
| Adjustments for fair value losses (gains) | — | — | — |
2,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
| Cash flows from (used in) operations | — | — | — |
374,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
348,900,000
GBP
|
| Interest paid, classified as operating activities | — | — | — |
54,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
77,000,000
GBP
|
| Interest received, classified as operating activities | — | — | — |
22,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
14,800,000
GBP
|
| Income taxes paid (refund), classified as operating activities | — | — | — |
27,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
25,400,000
GBP
|
| Cash flows from (used in) operating activities | — | — | — |
314,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
261,300,000
GBP
|
| Cash flows from (used in) investing activities [abstract] | ||||||||||||||||||||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities | — | — | — |
1,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
158,600,000
GBP
|
| Proceeds from sales of property, plant and equipment, classified as investing activities | — | — | — |
30,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
38,500,000
GBP
|
| Purchase of property, plant and equipment, classified as investing activities | — | — | — |
109,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
104,200,000
GBP
|
| Proceeds from sales of intangible assets, classified as investing activities | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
400,000
GBP
|
| Purchase of intangible assets, classified as investing activities | — | — | — |
32,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
20,900,000
GBP
|
| Cash advances and loans made to other parties, classified as investing activities | — | — | — |
2,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
| Cash receipts from repayment of advances and loans made to other parties, classified as investing activities | — | — | — |
7,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
2,400,000
GBP
|
| Dividends received, classified as investing activities | — | — | — |
7,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
8,700,000
GBP
|
| Cash flows from (used in) investing activities | — | — | — |
100,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
83,500,000
GBP
|
| Cash flows from (used in) financing activities [abstract] | ||||||||||||||||||||||
| Payments to acquire or redeem entity's shares | — | — | — |
12,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
| Proceeds from borrowings, classified as financing activities | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
416,600,000
GBP
|
| Repayments of borrowings, classified as financing activities | — | — | — |
13,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
972,800,000
GBP
|
| Payments of lease liabilities, classified as financing activities | — | — | — |
49,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
108,500,000
GBP
|
| Cash flows from (used in) financing activities | — | — | — |
85,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
666,100,000
GBP
|
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — | — | — |
128,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
321,300,000
GBP
|
| Effect of exchange rate changes on cash and cash equivalents [abstract] | ||||||||||||||||||||||
| Effect of exchange rate changes on cash and cash equivalents | — | — | — |
5,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
5,700,000
GBP
|
| Cash and cash equivalents | — | — | — | — |
570,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
451,700,000
GBP
|
— | — | — | — | — | — |