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) operations | — |
413,000,000
GBP
|
267,100,000
GBP
|
— | — |
| Interest paid, classified as operating activities | — |
14,600,000
GBP
|
8,000,000
GBP
|
— | — |
| Interest received, classified as operating activities | — |
2,000,000
GBP
|
1,000,000
GBP
|
— | — |
| Income taxes paid (refund), classified as operating activities | — |
93,900,000
GBP
|
57,100,000
GBP
|
— | — |
| Cash flows from (used in) operating activities | — |
306,500,000
GBP
|
203,000,000
GBP
|
— | — |
| Cash flows from (used in) investing activities [abstract] | |||||
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — |
237,200,000
GBP
|
2,200,000
GBP
|
— | — |
| 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 | — |
18,600,000
GBP
|
17,700,000
GBP
|
— | — |
| Purchase of intangible assets, classified as investing activities | — |
27,500,000
GBP
|
24,800,000
GBP
|
— | — |
| Cash flows from (used in) investing activities | — |
270,500,000
GBP
|
40,300,000
GBP
|
— | — |
| Cash flows from (used in) financing activities [abstract] | |||||
| Proceeds from issuing shares | — |
4,800,000
GBP
|
3,000,000
GBP
|
— | — |
| Payments to acquire or redeem entity's shares | — |
2,100,000
GBP
|
2,900,000
GBP
|
— | — |
| Proceeds from borrowings, classified as financing activities | — |
83,200,000
GBP
|
–
GBP
|
— | — |
| Repayments of borrowings, classified as financing activities | — |
58,100,000
GBP
|
700,000
GBP
|
— | — |
| Payments of lease liabilities, classified as financing activities | — |
18,800,000
GBP
|
17,800,000
GBP
|
— | — |
| Dividends paid, classified as financing activities | — |
88,600,000
GBP
|
76,200,000
GBP
|
— | — |
| Cash flows from (used in) financing activities | — |
79,600,000
GBP
|
94,600,000
GBP
|
— | — |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — |
43,600,000
GBP
|
68,100,000
GBP
|
— | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||
| Effect of exchange rate changes on cash and cash equivalents | — |
5,700,000
GBP
|
3,900,000
GBP
|
— | — |
| Cash and cash equivalents |
120,500,000
GBP
|
— | — |
158,400,000
GBP
|
86,400,000
GBP
|