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 |
|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||
| Cash flows from (used in) operating activities [abstract] | ||||
| Cash flows from (used in) operations | — |
912,600,000
GBP
|
804,300,000
GBP
|
— |
| Cash flows from (used in) operating activities | — |
912,300,000
GBP
|
813,300,000
GBP
|
— |
| Cash flows from (used in) investing activities [abstract] | ||||
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — |
13,600,000
GBP
|
41,500,000
GBP
|
— |
| Proceeds from sales of property, plant and equipment, classified as investing activities | — |
11,000,000
GBP
|
10,000,000
GBP
|
— |
| Purchase of property, plant and equipment, classified as investing activities | — |
1,553,000,000
GBP
|
1,169,700,000
GBP
|
— |
| Purchase of intangible assets, classified as investing activities | — |
39,800,000
GBP
|
30,000,000
GBP
|
— |
| Cash receipts from repayment of advances and loans made to other parties, classified as investing activities | — |
400,000
GBP
|
2,700,000
GBP
|
— |
| Interest received, classified as investing activities | — |
57,500,000
GBP
|
37,000,000
GBP
|
— |
| Cash flows from (used in) investing activities | — |
1,537,500,000
GBP
|
1,191,500,000
GBP
|
— |
| Cash flows from (used in) financing activities [abstract] | ||||
| Proceeds from issuing shares | — |
16,100,000
GBP
|
1,000,700,000
GBP
|
— |
| Payments to acquire or redeem entity's shares | — |
–
GBP
|
1,800,000
GBP
|
— |
| Proceeds from borrowings, classified as financing activities | — |
1,440,200,000
GBP
|
1,469,200,000
GBP
|
— |
| Repayments of borrowings, classified as financing activities | — |
54,800,000
GBP
|
603,600,000
GBP
|
— |
| Payments of lease liabilities, classified as financing activities | — |
13,600,000
GBP
|
10,500,000
GBP
|
— |
| Interest paid, classified as financing activities | — |
307,900,000
GBP
|
243,600,000
GBP
|
— |
| Cash flows from (used in) financing activities | — |
718,600,000
GBP
|
1,300,900,000
GBP
|
— |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — |
93,400,000
GBP
|
922,700,000
GBP
|
— |
| Cash and cash equivalents |
1,048,100,000
GBP
|
— | — |
953,200,000
GBP
|