Statement Of Cash Flows [Abstract]
| Concept |
2023-07-01 to 2024-06-30 |
As at 2024-06-30 |
As at 2023-06-30 |
2022-07-01 to 2023-06-30 |
As at 2022-06-30 |
|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||
| Cash flows from (used in) operating activities [abstract] | |||||
| Cash flows from (used in) operations |
112,500,000
GBP
|
— | — |
111,600,000
GBP
|
— |
| Income taxes paid (refund), classified as operating activities |
23,400,000
GBP
|
— | — |
7,100,000
GBP
|
— |
| Cash flows from (used in) operating activities |
89,100,000
GBP
|
— | — |
104,500,000
GBP
|
— |
| Cash flows from (used in) investing activities [abstract] | |||||
| Purchase of property, plant and equipment, classified as investing activities |
800,000
GBP
|
— | — |
400,000
GBP
|
— |
| Interest received, classified as investing activities |
21,200,000
GBP
|
— | — |
15,200,000
GBP
|
— |
| Cash flows from (used in) investing activities |
108,400,000
GBP
|
— | — |
5,200,000
GBP
|
— |
| Cash flows from (used in) financing activities [abstract] | |||||
| Payments to acquire or redeem entity's shares |
13,800,000
GBP
|
— | — |
15,600,000
GBP
|
— |
| Payments of lease liabilities, classified as financing activities |
2,200,000
GBP
|
— | — |
2,200,000
GBP
|
— |
| Interest paid, classified as financing activities |
300,000
GBP
|
— | — |
300,000
GBP
|
— |
| Cash flows from (used in) financing activities |
151,200,000
GBP
|
— | — |
170,700,000
GBP
|
— |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes |
170,500,000
GBP
|
— | — |
71,400,000
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
|
— | — |
2,000,000
GBP
|
— |
| Cash and cash equivalents | — |
308,000,000
GBP
|
478,600,000
GBP
|
— |
552,000,000
GBP
|