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 | — |
260,000,000
GBP
|
386,000,000
GBP
|
— | — |
| Interest paid, classified as operating activities | — |
57,000,000
GBP
|
51,000,000
GBP
|
— | — |
| Interest received, classified as operating activities | — |
2,000,000
GBP
|
3,000,000
GBP
|
— | — |
| Income taxes paid (refund), classified as operating activities | — |
7,000,000
GBP
|
6,000,000
GBP
|
— | — |
| Cash flows from (used in) operating activities | — |
270,000,000
GBP
|
409,000,000
GBP
|
— | — |
| Cash flows from (used in) investing activities [abstract] | |||||
| Cash advances and loans made to other parties, classified as investing activities | — |
292,000,000
GBP
|
186,000,000
GBP
|
— | — |
| Income taxes paid (refund), classified as investing activities | — |
2,000,000
GBP
|
1,000,000
GBP
|
— | — |
| Cash flows from (used in) investing activities | — |
853,000,000
GBP
|
172,000,000
GBP
|
— | — |
| Cash flows from (used in) financing activities [abstract] | |||||
| Proceeds from issuing shares | — |
295,000,000
GBP
|
1,000,000
GBP
|
— | — |
| Proceeds from borrowings, classified as financing activities | — |
138,000,000
GBP
|
361,000,000
GBP
|
— | — |
| Repayments of borrowings, classified as financing activities | — |
132,000,000
GBP
|
385,000,000
GBP
|
— | — |
| Payments of lease liabilities, classified as financing activities | — |
3,000,000
GBP
|
3,000,000
GBP
|
— | — |
| Cash flows from (used in) financing activities | — |
552,000,000
GBP
|
274,000,000
GBP
|
— | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — |
31,000,000
GBP
|
37,000,000
GBP
|
— | — |
| Cash and cash equivalents |
57,000,000
GBP
|
— | — |
88,000,000
GBP
|
125,000,000
GBP
|