Statement Of Cash Flows [Abstract]
| Concept |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
As at 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
As at 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||||||||||
| Cash flows from (used in) operating activities [abstract] | ||||||||||||
| Profit (loss) |
–
GBP
|
126,900,000
GBP
|
— |
–
GBP
|
–
GBP
|
126,900,000
GBP
|
— |
–
GBP
|
–
GBP
|
204,900,000
GBP
|
–
GBP
|
204,900,000
GBP
|
| Cash flows from (used in) operations | — |
865,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
883,100,000
GBP
|
| Interest paid, classified as operating activities | — |
175,600,000
GBP
|
— | — | — | — | — | — | — | — | — |
118,200,000
GBP
|
| Interest received, classified as operating activities | — |
50,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
15,800,000
GBP
|
| Cash flows from (used in) operating activities | — |
745,100,000
GBP
|
— | — | — | — | — | — | — | — | — |
787,500,000
GBP
|
| Cash flows from (used in) investing activities [abstract] | ||||||||||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities | — |
–
GBP
|
— | — | — | — | — | — | — | — | — |
90,500,000
GBP
|
| Proceeds from sales of property, plant and equipment, classified as investing activities | — |
4,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
–
GBP
|
| Purchase of property, plant and equipment, classified as investing activities | — |
749,500,000
GBP
|
— | — | — | — | — | — | — | — | — |
675,900,000
GBP
|
| Purchase of intangible assets, classified as investing activities | — |
14,600,000
GBP
|
— | — | — | — | — | — | — | — | — |
18,100,000
GBP
|
| Proceeds from government grants, classified as investing activities | — |
27,900,000
GBP
|
— | — | — | — | — | — | — | — | — |
5,100,000
GBP
|
| Cash flows from (used in) investing activities | — |
731,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
593,400,000
GBP
|
| Cash flows from (used in) financing activities [abstract] | ||||||||||||
| Payments to acquire or redeem entity's shares | — |
3,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
6,800,000
GBP
|
| Repayments of borrowings, classified as financing activities | — |
248,500,000
GBP
|
— | — | — | — | — | — | — | — | — |
278,100,000
GBP
|
| Cash flows from (used in) financing activities | — |
1,037,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
85,000,000
GBP
|
| Effect of exchange rate changes on cash and cash equivalents [abstract] | ||||||||||||
| Effect of exchange rate changes on cash and cash equivalents | — |
–
GBP
|
— | — | — | — | — | — | — | — | — |
1,300,000
GBP
|
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — |
1,051,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
107,800,000
GBP
|
| Cash and cash equivalents | — | — |
1,399,300,000
GBP
|
— | — | — |
340,400,000
GBP
|
— | — | — | — | — |