Statement Of Financial Position [Abstract]
| Concept |
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 |
As at 2020-09-30 |
As at 2020-09-30 |
As at 2020-09-30 |
As at 2020-09-30 |
As at 2020-09-30 |
As at 2020-09-30 |
As at 2020-09-30 |
As at 2020-09-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||||||
| Property, plant and equipment | — | — |
526,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
379,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Right-of-use assets | — | — |
1,714,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
1,401,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Goodwill | — | — |
488,978,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
141,160,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Deferred tax assets | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — |
366,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — |
51,817,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
397,451,000
GBP
|
— | — | — | — | — | — | — | — |
14,193,000
GBP
|
— |
| Assets | — | — |
806,955,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
619,055,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||
| Issued capital | — | — |
12,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
12,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Retained earnings | — | — |
36,412,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
33,287,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Share premium | — | — |
235,903,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
235,903,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Other reserves | — | — |
238,385,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
238,385,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Equity |
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
|
440,000
GBP
|
16,388,000
GBP
|
11,000
GBP
|
276,000
GBP
|
–
GBP
|
–
GBP
|
15,416,000
GBP
|
1,125,000
GBP
|
| Liabilities [abstract] | ||||||||||||||||||||||||
| Deferred tax liabilities | — | — |
64,618,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
9,260,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Liabilities | — | — |
267,632,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
179,601,000
GBP
|
— | — | — | — | — | — | — | — | — | — |