Statement Of Financial Position [Abstract]
| Concept |
As at 2023-09-30 |
As at 2023-09-30 |
As at 2023-09-30 |
As at 2023-09-30 |
As at 2023-09-30 |
As at 2023-09-30 |
As at 2023-09-30 |
As at 2023-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2021-09-30 |
As at 2021-09-30 |
As at 2021-09-30 |
As at 2021-09-30 |
As at 2021-09-30 |
As at 2021-09-30 |
As at 2021-09-30 |
As at 2021-09-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||||||||
| Property, plant and equipment | — | — | — | — | — | — |
734,000
GBP
|
— | — | — |
526,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Right-of-use assets | — | — | — | — | — | — |
3,231,000
GBP
|
— | — | — |
1,714,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Goodwill | — | — | — | — | — | — |
474,315,000
GBP
|
— | — | — |
488,978,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other non-current receivables | — | — | — | — | — | — |
113,000
GBP
|
— | — | — |
90,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current assets | — | — | — | — | — | — |
699,505,000
GBP
|
— | — | — |
737,783,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||||||||||||||
| Trade and other current receivables | — | — | — | — | — | — |
17,894,000
GBP
|
— | — | — |
15,790,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Current tax assets, current | — | — | — | — | — | — |
101,000
GBP
|
— | — | — |
1,565,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — | — | — | — |
8,539,000
GBP
|
— | — | — |
51,817,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
397,451,000
GBP
|
— | — |
| Current assets | — | — | — | — | — | — |
26,534,000
GBP
|
— | — | — |
69,172,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Assets | — | — | — | — | — | — |
726,039,000
GBP
|
— | — | — |
806,955,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||
| Issued capital | — | — | — | — | — | — |
12,000
GBP
|
— | — | — |
12,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings | — | — | — | — | — | — |
4,361,000
GBP
|
— | — | — |
36,412,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Share premium | — | — | — | — | — | — |
236,231,000
GBP
|
— | — | — |
235,903,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Other reserves | — | — | — | — | — | — |
238,385,000
GBP
|
— | — | — |
238,385,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
36,203,000
GBP
|
4,361,000
GBP
|
236,231,000
GBP
|
238,385,000
GBP
|
23,485,000
GBP
|
12,000
GBP
|
529,960,000
GBP
|
5,000
GBP
|
238,385,000
GBP
|
235,903,000
GBP
|
539,323,000
GBP
|
36,412,000
GBP
|
34,690,000
GBP
|
12,000
GBP
|
66,740,000
GBP
|
5,000
GBP
|
1,649,000
GBP
|
238,385,000
GBP
|
5,000
GBP
|
3,213,000
GBP
|
33,287,000
GBP
|
439,454,000
GBP
|
12,000
GBP
|
235,903,000
GBP
|
| Liabilities [abstract] | ||||||||||||||||||||||||
| Non-current liabilities [abstract] | ||||||||||||||||||||||||
| Deferred tax liabilities | — | — | — | — | — | — |
40,689,000
GBP
|
— | — | — |
64,618,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Current tax liabilities, non-current | — | — | — | — | — | — |
800,000
GBP
|
— | — | — |
1,074,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current liabilities | — | — | — | — | — | — |
153,114,000
GBP
|
— | — | — |
216,648,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | ||||||||||||||||||||||||
| Trade and other current payables | — | — | — | — | — | — |
26,407,000
GBP
|
— | — | — |
18,780,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Current tax liabilities, current | — | — | — | — | — | — |
3,098,000
GBP
|
— | — | — |
475,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities | — | — | — | — | — | — |
42,965,000
GBP
|
— | — | — |
50,984,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities | — | — | — | — | — | — |
196,079,000
GBP
|
— | — | — |
267,632,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |