Statement Of Cash Flows [Abstract]
| Concept |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||||||||||||
| Cash flows from (used in) operating activities [abstract] | ||||||||||||||
| Profit (loss) |
–
GBP
|
108,000,000
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
108,000,000
GBP
|
–
GBP
|
–
GBP
|
276,000,000
GBP
|
— |
–
GBP
|
–
GBP
|
276,000,000
GBP
|
| Adjustments to reconcile profit (loss) [abstract] | ||||||||||||||
| Adjustments for decrease (increase) in inventories | — |
396,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
139,000,000
GBP
|
| Adjustments for impairment loss (reversal of impairment loss) recognised in profit or loss | — |
70,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
27,000,000
GBP
|
| Adjustments for provisions | — |
7,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
7,000,000
GBP
|
| Adjustments for share-based payments | — |
5,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
7,000,000
GBP
|
| Adjustments for fair value losses (gains) | — |
10,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
2 2
GBP
|
| Adjustments for losses (gains) on disposal of non-current assets | — |
2,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
6,000,000
GBP
|
| Income taxes paid (refund), classified as operating activities | — |
92,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
75,000,000
GBP
|
| Cash flows from (used in) operating activities | — |
592,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
291,000,000
GBP
|
| Cash flows from (used in) investing activities [abstract] | ||||||||||||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities | — |
41,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
187,000,000
GBP
|
| Other cash receipts from sales of interests in joint ventures, classified as investing activities | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
2,000,000
GBP
|
| Purchase of property, plant and equipment, classified as investing activities | — |
301,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
253,000,000
GBP
|
| Purchase of intangible assets, classified as investing activities | — |
67,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
63,000,000
GBP
|
| Proceeds from sales of other long-term assets, classified as investing activities | — |
5,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
8,000,000
GBP
|
| Proceeds from government grants, classified as investing activities | — |
5,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
7,000,000
GBP
|
| Interest received, classified as investing activities | — |
62,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
28,000,000
GBP
|
| Cash flows from (used in) investing activities | — |
255,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
101,000,000
GBP
|
| Cash flows from (used in) financing activities [abstract] | ||||||||||||||
| Payments to acquire or redeem entity's shares | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
45,000,000
GBP
|
| Proceeds from borrowings, classified as financing activities | — |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
672,000,000
GBP
|
| Repayments of borrowings, classified as financing activities | — |
151,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
281,000,000
GBP
|
| Payments of lease liabilities, classified as financing activities | — |
11,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
14,000,000
GBP
|
| Interest paid, classified as financing activities | — |
137,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
94,000,000
GBP
|
| Cash flows from (used in) financing activities | — |
439,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
97,000,000
GBP
|
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — |
102,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
287,000,000
GBP
|
| Effect of exchange rate changes on cash and cash equivalents [abstract] | ||||||||||||||
| Effect of exchange rate changes on cash and cash equivalents | — |
5,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
4,000,000
GBP
|
| Cash and cash equivalents | — | — |
542,000,000
GBP
|
— | — | — | — | — | — | — |
650,000,000
GBP
|
— | — | — |