Statement Of Cash Flows [Abstract]
| Concept |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
As at 2022-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
As at 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||||||||||||
| Cash flows from (used in) operating activities [abstract] | ||||||||||||||
| Profit (loss) |
–
GBP
|
–
GBP
|
101,000,000
GBP
|
–
GBP
|
–
GBP
|
101,000,000
GBP
|
— |
–
GBP
|
–
GBP
|
— |
–
GBP
|
–
GBP
|
205,000,000
GBP
|
205,000,000
GBP
|
| Adjustments to reconcile profit (loss) [abstract] | ||||||||||||||
| Adjustments for decrease (increase) in inventories | — | — | — | — | — |
123,000,000
GBP
|
— | — | — | — | — | — | — |
19,000,000
GBP
|
| Adjustments for impairment loss (reversal of impairment loss) recognised in profit or loss | — | — | — | — | — |
632,000,000
GBP
|
— | — | — | — | — | — | — |
122,000,000
GBP
|
| Adjustments for provisions | — | — | — | — | — |
25,000,000
GBP
|
— | — | — | — | — | — | — |
41,000,000
GBP
|
| Adjustments for share-based payments | — | — | — | — | — |
8,000,000
GBP
|
— | — | — | — | — | — | — |
9,000,000
GBP
|
| Adjustments for fair value losses (gains) | — | — | — | — | — |
19,000,000
GBP
|
— | — | — | — | — | — | — |
45,000,000
GBP
|
| Adjustments for losses (gains) on disposal of non-current assets | — | — | — | — | — |
2,000,000
GBP
|
— | — | — | — | — | — | — |
4,000,000
GBP
|
| Income taxes paid (refund), classified as operating activities | — | — | — | — | — |
1 07
GBP
|
— | — | — | — | — | — | — |
65,000,000
GBP
|
| Cash flows from (used in) operating activities | — | — | — | — | — |
605,000,000
GBP
|
— | — | — | — | — | — | — |
769,000,000
GBP
|
| Cash flows from (used in) investing activities [abstract] | ||||||||||||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities | — | — | — | — | — |
160,000,000
GBP
|
— | — | — | — | — | — | — |
19,000,000
GBP
|
| Purchase of property, plant and equipment, classified as investing activities | — | — | — | — | — |
3 58
GBP
|
— | — | — | — | — | — | — |
304,000,000
GBP
|
| Purchase of intangible assets, classified as investing activities | — | — | — | — | — |
95,000,000
GBP
|
— | — | — | — | — | — | — |
77,000,000
GBP
|
| Proceeds from sales of other long-term assets, classified as investing activities | — | — | — | — | — |
1,000,000
GBP
|
— | — | — | — | — | — | — |
5,000,000
GBP
|
| Interest received, classified as investing activities | — | — | — | — | — |
32,000,000
GBP
|
— | — | — | — | — | — | — |
66,000,000
GBP
|
| Cash flows from (used in) investing activities | — | — | — | — | — |
260,000,000
GBP
|
— | — | — | — | — | — | — |
291,000,000
GBP
|
| Cash flows from (used in) financing activities [abstract] | ||||||||||||||
| Payments to acquire or redeem entity's shares | — | — | — | — | — |
155,000,000
GBP
|
— | — | — | — | — | — | — |
–
GBP
|
| Proceeds from borrowings, classified as financing activities | — | — | — | — | — |
9,000,000
GBP
|
— | — | — | — | — | — | — |
368,000,000
GBP
|
| Repayments of borrowings, classified as financing activities | — | — | — | — | — |
140,000,000
GBP
|
— | — | — | — | — | — | — |
2 98
GBP
|
| Payments of lease liabilities, classified as financing activities | — | — | — | — | — |
14,000,000
GBP
|
— | — | — | — | — | — | — |
14,000,000
GBP
|
| Interest paid, classified as financing activities | — | — | — | — | — |
111,000,000
GBP
|
— | — | — | — | — | — | — |
1 59
GBP
|
| Cash flows from (used in) financing activities | — | — | — | — | — |
550,000,000
GBP
|
— | — | — | — | — | — | — |
202,000,000
GBP
|
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — | — | — | — | — |
205,000,000
GBP
|
— | — | — | — | — | — | — |
276,000,000
GBP
|
| Effect of exchange rate changes on cash and cash equivalents [abstract] | ||||||||||||||
| Effect of exchange rate changes on cash and cash equivalents | — | — | — | — | — |
6,000,000
GBP
|
— | — | — | — | — | — | — |
4,000,000
GBP
|
| Cash and cash equivalents | — | — | — | — | — | — |
391,000,000
GBP
|
— | — |
581,000,000
GBP
|
— | — | — | — |