Statement Of Cash Flows [Abstract]
| Concept |
As at 2025-03-31 |
2024-04-01 to 2025-03-31 |
2023-04-01 to 2024-03-31 |
As at 2024-03-31 |
As at 2023-03-31 |
|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||
| Cash flows from (used in) operating activities [abstract] | |||||
| Cash flows from (used in) operations | — |
381,000,000
GBP
|
42 9
GBP
|
— | — |
| Interest paid, classified as operating activities | — |
1 4 4
GBP
|
1 0 1
GBP
|
— | — |
| Interest received, classified as operating activities | — |
23,000,000
GBP
|
24,000,000
GBP
|
— | — |
| Other inflows (outflows) of cash, classified as operating activities | — |
3,000,000
GBP
|
1,000,000
GBP
|
— | — |
| Cash flows from (used in) operating activities | — |
256,000,000
GBP
|
338,000,000
GBP
|
— | — |
| Cash flows from (used in) investing activities [abstract] | |||||
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — |
1 8
GBP
|
–
GBP
|
— | — |
| Cash flows from (used in) investing activities | — |
3 83
GBP
|
27 2
GBP
|
— | — |
| Cash flows from (used in) financing activities [abstract] | |||||
| Proceeds from borrowings, classified as financing activities | — |
96 3
GBP
|
70 8
GBP
|
— | — |
| Repayments of borrowings, classified as financing activities | — |
56 2
GBP
|
4 2 7
GBP
|
— | — |
| Dividends paid, classified as financing activities | — |
305,000,000
GBP
|
291,000,000
GBP
|
— | — |
| Other inflows (outflows) of cash, classified as financing activities | — |
1,000,000
GBP
|
1,000,000
GBP
|
— | — |
| Cash flows from (used in) financing activities | — |
88,000,000
GBP
|
29,000,000
GBP
|
— | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — |
39,000,000
GBP
|
37,000,000
GBP
|
— | — |
| Cash and cash equivalents |
39,000,000
GBP
|
— | — |
78,000,000
GBP
|
41,000,000
GBP
|