Statement Of Cash Flows [Abstract]
| Concept |
2021-04-01 to 2022-03-31 |
As at 2022-03-31 |
As at 2021-03-31 |
2020-04-01 to 2021-03-31 |
As at 2020-03-31 |
|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||
| Cash flows from (used in) operating activities [abstract] | |||||
| Interest paid, classified as operating activities |
25,000,000
GBP
|
— | — |
24,600,000
GBP
|
— |
| Interest received, classified as operating activities |
400,000
GBP
|
— | — |
200,000
GBP
|
— |
| Other inflows (outflows) of cash, classified as operating activities |
21,500,000
GBP
|
— | — |
16,500,000
GBP
|
— |
| Cash flows from (used in) operating activities |
94,600,000
GBP
|
— | — |
77,400,000
GBP
|
— |
| Cash flows from (used in) investing activities [abstract] | |||||
| Proceeds from sales of property, plant and equipment, classified as investing activities |
15,100,000
GBP
|
— | — |
26,200,000
GBP
|
— |
| Cash flows from (used in) investing activities |
293,900,000
GBP
|
— | — |
267,500,000
GBP
|
— |
| Cash flows from (used in) financing activities [abstract] | |||||
| Repayments of borrowings, classified as financing activities |
20,000,000
GBP
|
— | — |
190,000,000
GBP
|
— |
| Dividends paid, classified as financing activities |
75,400,000
GBP
|
— | — |
61,900,000
GBP
|
— |
| Cash flows from (used in) financing activities |
396,200,000
GBP
|
— | — |
218,200,000
GBP
|
— |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes |
196,900,000
GBP
|
— | — |
28,100,000
GBP
|
— |
| Cash and cash equivalents | — |
243,500,000
GBP
|
46,600,000
GBP
|
— |
18,500,000
GBP
|