Statement Of Cash Flows [Abstract]
| Concept |
2024-03-31 to 2025-03-29 |
2024-03-31 to 2025-03-29 |
As at 2025-03-29 |
2024-03-31 to 2025-03-29 |
2024-03-31 to 2025-03-29 |
2024-03-31 to 2025-03-29 |
2024-03-31 to 2025-03-29 |
2024-03-31 to 2025-03-29 |
2023-04-02 to 2024-03-30 |
2023-04-02 to 2024-03-30 |
As at 2024-03-30 |
2023-04-02 to 2024-03-30 |
2023-04-01 to 2024-03-30 |
2023-04-02 to 2024-03-30 |
2023-04-02 to 2024-03-30 |
2023-04-02 to 2024-03-30 |
2023-04-02 to 2024-03-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||||||||||||
| Cash flows from (used in) operating activities [abstract] | |||||||||||||||||
| Profit (loss) |
75,000,000
GBP
|
–
GBP
|
— |
–
GBP
|
–
GBP
|
75,000,000
GBP
|
75,000,000
GBP
|
–
GBP
|
270,000,000
GBP
|
270,000,000
GBP
|
— |
271,000,000
GBP
|
271,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
1,000,000
GBP
|
| Adjustments to reconcile profit (loss) [abstract] | |||||||||||||||||
| Adjustments for decrease (increase) in inventories |
80,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
57,000,000
GBP
|
— | — | — | — | — |
| Adjustments for impairment loss (reversal of impairment loss) recognised in profit or loss |
4,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — |
| Adjustments for share-based payments |
18,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
16,000,000
GBP
|
— | — | — | — | — |
| Cash flows from (used in) operations |
526,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
665,000,000
GBP
|
— | — | — | — | — |
| Interest paid, classified as operating activities |
75,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
52,000,000
GBP
|
— | — | — | — | — |
| Interest received, classified as operating activities |
21,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
32,000,000
GBP
|
— | — | — | — | — |
| Income taxes paid (refund), classified as operating activities |
43,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
139,000,000
GBP
|
— | — | — | — | — |
| Cash flows from (used in) operating activities |
429,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
506,000,000
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
|
— | — | — | — | — | — | — | — | — | — |
19,000,000
GBP
|
— | — | — | — | — |
| Proceeds from sales of property, plant and equipment, classified as investing activities |
12,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — |
| Purchase of property, plant and equipment, classified as investing activities |
122,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
158,000,000
GBP
|
— | — | — | — | — |
| Purchase of intangible assets, classified as investing activities |
29,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
50,000,000
GBP
|
— | — | — | — | — |
| Cash flows from (used in) investing activities |
127,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
231,000,000
GBP
|
— | — | — | — | — |
| Cash flows from (used in) financing activities [abstract] | |||||||||||||||||
| Proceeds from issuing shares |
–
GBP
|
— | — | — | — | — | — | — | — | — | — |
1,000,000
GBP
|
— | — | — | — | — |
| Proceeds from borrowings, classified as financing activities |
439,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — |
| Payments of lease liabilities, classified as financing activities |
232,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
231,000,000
GBP
|
— | — | — | — | — |
| Dividends paid, classified as financing activities |
152,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
233,000,000
GBP
|
— | — | — | — | — |
| Cash flows from (used in) financing activities |
48,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
865,000,000
GBP
|
— | — | — | — | — |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes |
350,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
590,000,000
GBP
|
— | — | — | — | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||||||||||||||
| Effect of exchange rate changes on cash and cash equivalents |
4,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
9,000,000
GBP
|
— | — | — | — | — |
| Cash and cash equivalents | — | — |
813,000,000
GBP
|
— | — | — | — | — | — | — |
441,000,000
GBP
|
— | — | — | — | — | — |