Statement Of Cash Flows [Abstract]
| Concept |
As at 2023-06-30 |
2022-07-01 to 2023-06-30 |
2021-07-01 to 2022-06-30 |
As at 2022-06-30 |
As at 2021-06-30 |
|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||
| Cash flows from (used in) operating activities [abstract] | |||||
| Cash flows from (used in) operations | — |
7,400,000
GBP
|
11,400,000
GBP
|
— | — |
| Dividends received, classified as operating activities | — |
4,700,000
GBP
|
4,600,000
GBP
|
— | — |
| Interest received, classified as operating activities | — |
3,000,000
GBP
|
300,000
GBP
|
— | — |
| Cash flows from (used in) operating activities | — |
7,000,000
GBP
|
11,300,000
GBP
|
— | — |
| Cash flows from (used in) investing activities [abstract] | |||||
| Purchase of property, plant and equipment, classified as investing activities | — |
-
GBP
|
300,000
GBP
|
— | — |
| Purchase of intangible assets, classified as investing activities | — |
6,600,000
GBP
|
4,200,000
GBP
|
— | — |
| Cash flows from (used in) investing activities | — |
6,300,000
GBP
|
4,500,000
GBP
|
— | — |
| Cash flows from (used in) financing activities [abstract] | |||||
| Payments of lease liabilities, classified as financing activities | — |
400,000
GBP
|
500,000
GBP
|
— | — |
| Dividends paid, classified as financing activities | — |
5,900,000
GBP
|
6,100,000
GBP
|
— | — |
| Cash flows from (used in) financing activities | — |
6,300,000
GBP
|
6,600,000
GBP
|
— | — |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — |
5,600,000
GBP
|
200,000
GBP
|
— | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||
| Effect of exchange rate changes on cash and cash equivalents | — |
1,100,000
GBP
|
2,000,000
GBP
|
— | — |
| Cash and cash equivalents |
52,200,000
GBP
|
— | — |
58,900,000
GBP
|
56,700,000
GBP
|