Statement Of Financial Position [Abstract]
| Concept |
As at 2023-06-30 |
As at 2023-06-30 |
As at 2023-06-30 |
As at 2023-06-30 |
As at 2023-06-30 |
As at 2023-06-30 |
As at 2023-06-30 |
As at 2023-06-30 |
As at 2022-06-30 |
As at 2022-06-30 |
As at 2022-06-30 |
As at 2022-06-30 |
As at 2022-06-30 |
As at 2022-06-30 |
As at 2022-06-30 |
As at 2022-06-30 |
As at 2021-06-30 |
As at 2021-06-30 |
As at 2021-06-30 |
As at 2021-06-30 |
As at 2021-06-30 |
As at 2021-06-30 |
As at 2021-06-30 |
As at 2021-06-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||||||||
| Property, plant and equipment | — | — | — | — | — |
6,500,000
GBP
|
— | — | — | — | — | — | — |
9,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Deferred tax assets | — | — | — | — | — |
23,900,000
GBP
|
— | — | — | — | — | — | — |
32,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Non-current assets | — | — | — | — | — |
17 4.0
GBP
|
— | — | — | — | — | — | — |
174,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||||||||||||||
| Trade and other current receivables | — | — | — | — | — |
70,400,000
GBP
|
— | — | — | — | — | — | — |
74,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — | — | — |
478,600,000
GBP
|
— | — | — | — | — | — | — |
552,000,000
GBP
|
— | — |
456,100,000
GBP
|
— | — | — | — | — | — | — |
| Current assets | — | — | — | — | — |
834,700,000
GBP
|
— | — | — | — | — | — | — |
923,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Assets | — | — | — | — | — |
1,0 08.7
GBP
|
— | — | — | — | — | — | — |
1,0 98.2
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||
| Issued capital | — | — | — | — | — |
100,000
GBP
|
— | — | — | — | — | — | — |
100,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Retained earnings | — | — | — | — | — |
875,400,000
GBP
|
— | — | — | — | — | — | — |
901,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Share premium | — | — | — | — | — |
15,600,000
GBP
|
— | — | — | — | — | — | — |
15,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent | — | — | — | — | — |
898,800,000
GBP
|
— | — | — | — | — | — | — |
945,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Non-controlling interests | — | — | — | — | — |
14,200,000
GBP
|
— | — | — | — | — | — | — |
21,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Equity |
7,700,000
GBP
|
875,400,000
GBP
|
14,200,000
GBP
|
898,800,000
GBP
|
15,600,000
GBP
|
913,000,000
GBP
|
–
GBP
|
100,000
GBP
|
901,000,000
GBP
|
15,600,000
GBP
|
21,800,000
GBP
|
33,200,000
GBP
|
945,000,000
GBP
|
966,800,000
GBP
|
4,900,000
GBP
|
100,000
GBP
|
932,700,000
GBP
|
46,200,000
GBP
|
15. 6
GBP
|
100,000
GBP
|
21,100,000
GBP
|
941,000,000
GBP
|
1,100,000
GBP
|
911,600,000
GBP
|
| Liabilities [abstract] | ||||||||||||||||||||||||
| Non-current liabilities [abstract] | ||||||||||||||||||||||||
| Deferred tax liabilities | — | — | — | — | — |
9,300,000
GBP
|
— | — | — | — | — | — | — |
8,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Non-current liabilities | — | — | — | — | — |
13,000,000
GBP
|
— | — | — | — | — | — | — |
14,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | ||||||||||||||||||||||||
| Trade and other current payables | — | — | — | — | — |
24,200,000
GBP
|
— | — | — | — | — | — | — |
36,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Current liabilities | — | — | — | — | — |
82,700,000
GBP
|
— | — | — | — | — | — | — |
116,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Liabilities | — | — | — | — | — |
95,700,000
GBP
|
— | — | — | — | — | — | — |
131,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Equity and liabilities | — | — | — | — | — |
1,008,700,000
GBP
|
— | — | — | — | — | — | — |
1,098,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — |