Statement Of Cash Flows [Abstract]
| Concept |
As at 2023-03-31 |
2022-04-01 to 2023-03-31 |
2021-04-01 to 2022-03-31 |
As at 2022-03-31 |
As at 2021-03-31 |
|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||
| Cash flows from (used in) operating activities [abstract] | |||||
| Cash flows from (used in) operating activities | — |
24,400,000
GBP
|
52,400,000
GBP
|
— | — |
| Cash flows from (used in) investing activities [abstract] | |||||
| Proceeds from sales of property, plant and equipment, classified as investing activities | — |
100,000
GBP
|
–
GBP
|
— | — |
| Purchase of property, plant and equipment, classified as investing activities | — |
2,100,000
GBP
|
7,500,000
GBP
|
— | — |
| Purchase of intangible assets, classified as investing activities | — |
100,000
GBP
|
1,000,000
GBP
|
— | — |
| Cash flows from (used in) investing activities | — |
7,700,000
GBP
|
9,600,000
GBP
|
— | — |
| Cash flows from (used in) financing activities [abstract] | |||||
| Payments from changes in ownership interests in subsidiaries that do not result in loss of control | — |
2,500,000
GBP
|
–
GBP
|
— | — |
| Payments of lease liabilities, classified as financing activities | — |
17,700,000
GBP
|
21,200,000
GBP
|
— | — |
| Cash flows from (used in) financing activities | — |
32,300,000
GBP
|
14,400,000
GBP
|
— | — |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — |
300,000
GBP
|
47,600,000
GBP
|
— | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||
| Effect of exchange rate changes on cash and cash equivalents | — |
100,000
GBP
|
–
GBP
|
— | — |
| Cash and cash equivalents |
19,100,000
GBP
|
— | — |
19,500,000
GBP
|
67,100,000
GBP
|