Statement Of Financial Position [Abstract]
| Concept |
As at 2025-03-31 |
As at 2025-03-31 |
As at 2025-03-31 |
As at 2025-03-31 |
As at 2025-03-31 |
As at 2025-03-31 |
As at 2025-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | |||||||||||||||||||||
| Assets [abstract] | |||||||||||||||||||||
| Non-current assets [abstract] | |||||||||||||||||||||
| Property, plant and equipment | — |
2 4 ,16 9
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
28, 54 6
GBP
|
— | — | — | — | — | — | — |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements | — |
—
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
2 , 517
GBP
|
— | — | — | — | — | — | — |
| Trade and other non-current receivables | — |
1 ,82 3
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
2,753,000
GBP
|
— | — | — | — | — | — | — |
| Deferred tax assets | — |
5 ,3 28
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
6 ,1 7 7
GBP
|
— | — | — | — | — | — | — |
| Non-current assets | — |
90 ,761
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
68 ,931
GBP
|
— | — | — | — | — | — | — |
| Current assets [abstract] | |||||||||||||||||||||
| Trade and other current receivables | — |
14 5, 84 2
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
1 62,056
GBP
|
— | — | — | — | — | — | — |
| Cash and cash equivalents | — |
2 4 7, 6 6 5
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
160,300,000
GBP
|
146, 218
GBP
|
— | — | — | — | — | — |
| Current assets | — |
6 41 , 2 17
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
6 4 7, 9 2 9
GBP
|
— | — | — | — | — | — | — |
| Assets | — |
731 ,978
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
7 16,860
GBP
|
— | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||||||||
| Equity [abstract] | |||||||||||||||||||||
| Issued capital | — |
70 ,57 3
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
70 ,5 73
GBP
|
— | — | — | — | — | — | — |
| Retained earnings | — |
3 7 7, 4 8 0
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
3 41 , 8 11
GBP
|
— | — | — | — | — | — | — |
| Share premium | — |
46 ,23 6
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
46, 236
GBP
|
— | — | — | — | — | — | — |
| Treasury shares | — |
17,047,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
2, 5 89
GBP
|
— | — | — | — | — | — | — |
| Other reserves | — |
6 2 ,1 76
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
5 5, 43 9
GBP
|
— | — | — | — | — | — | — |
| Equity |
6 2 ,176
GBP
|
4 1 7, 9 6 7
GBP
|
2 ,901
GBP
|
46, 23 6
GBP
|
1 7,0 47
GBP
|
70, 573
GBP
|
3 7 7, 4 8 0
GBP
|
5 5 ,4 39
GBP
|
3 41 , 81 1
GBP
|
46, 236
GBP
|
70,57 3
GBP
|
2 , 5 89
GBP
|
2 ,901
GBP
|
403 ,493
GBP
|
374,015,000
GBP
|
46, 236
GBP
|
70, 5 73
GBP
|
1 , 50 9
GBP
|
2,901,000
GBP
|
30 6,349
GBP
|
5 0, 5 35
GBP
|
| Liabilities [abstract] | |||||||||||||||||||||
| Non-current liabilities [abstract] | |||||||||||||||||||||
| Non-current provisions [abstract] | |||||||||||||||||||||
| Non-current provisions | — |
349,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
257,000
GBP
|
— | — | — | — | — | — | — |
| Trade and other non-current payables | — |
4,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
—
GBP
|
— | — | — | — | — | — | — |
| Deferred tax liabilities | — |
2 ,76 5
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
3 , 24 4
GBP
|
— | — | — | — | — | — | — |
| Non-current liabilities | — |
14, 3 51
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
15 ,501
GBP
|
— | — | — | — | — | — | — |
| Current liabilities [abstract] | |||||||||||||||||||||
| Current provisions [abstract] | |||||||||||||||||||||
| Current provisions | — |
5 ,28 2
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
3, 937
GBP
|
— | — | — | — | — | — | — |
| Trade and other current payables | — |
2 53 ,5 81
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
272 ,811
GBP
|
— | — | — | — | — | — | — |
| Current liabilities | — |
299, 660
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
297 ,866
GBP
|
— | — | — | — | — | — | — |
| Liabilities | — |
314,011,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
313, 367
GBP
|
— | — | — | — | — | — | — |
| Equity and liabilities | — |
731 ,978
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
716,860,000
GBP
|
— | — | — | — | — | — | — |