Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2025-03-31 |
As at 2025-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2023-03-31 |
|---|---|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||||
| Property, plant and equipment [abstract] | |||||
| Property, plant and equipment |
38,080,000
GBP
|
38,080,000
GBP
|
38,714,000
GBP
|
38,714,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||||
| Goodwill |
286,000
GBP
|
286,000
GBP
|
286,000
GBP
|
286,000
GBP
|
— |
| Investment property [abstract] | |||||
| Investment property |
2,513,000
GBP
|
2,513,000
GBP
|
7,216,000
GBP
|
7,216,000
GBP
|
— |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | |||||
| Investments in subsidiaries reported in separate financial statements |
250,000
GBP
|
—
GBP
|
—
GBP
|
250,000
GBP
|
— |
| Miscellaneous non-current assets [abstract] | |||||
| Non-current finance lease receivables |
—
GBP
|
—
GBP
|
65,000
GBP
|
65,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||||
| Trade and other current receivables |
10,113,000
GBP
|
10,113,000
GBP
|
7,310,000
GBP
|
7,310,000
GBP
|
— |
| Classes of current inventories [abstract] | |||||
| Current inventories |
44,425,000
GBP
|
44,425,000
GBP
|
42,251,000
GBP
|
42,251,000
GBP
|
— |
| Classes of current inventories, alternative [abstract] | |||||
| Cash and cash equivalents [abstract] | |||||
| Cash and cash equivalents |
3,762,000
GBP
|
3,762,000
GBP
|
438,000
GBP
|
438,000
GBP
|
4,226,000
GBP
|
| Miscellaneous current assets [abstract] | |||||
| Current finance lease receivables |
65,000
GBP
|
65,000
GBP
|
160,000
GBP
|
160,000
GBP
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||||
| Non-current portion of non-current loans received |
10,863,000
GBP
|
10,863,000
GBP
|
10,308,000
GBP
|
10,308,000
GBP
|
— |
| Current borrowings and current portion of non-current borrowings, by type [abstract] | |||||
| Current loans received and current portion of non-current loans received |
1,445,000
GBP
|
1,445,000
GBP
|
1,445,000
GBP
|
1,445,000
GBP
|
— |
| Trade and other current payables [abstract] | |||||
| Trade and other current payables |
52,031,000
GBP
|
51,781,000
GBP
|
45,597,000
GBP
|
45,847,000
GBP
|
— |
| Miscellaneous non-current liabilities [abstract] | |||||
| Non-current net defined benefit liability |
4,523,000
GBP
|
4,523,000
GBP
|
10,036,000
GBP
|
10,036,000
GBP
|
— |
| Issued capital [abstract] | |||||
| Issued capital |
1,439,000
GBP
|
1,439,000
GBP
|
1,439,000
GBP
|
1,439,000
GBP
|
— |
| Retained earnings [abstract] | |||||
| Retained earnings |
25,972,000
GBP
|
25,972,000
GBP
|
24,594,000
GBP
|
24,594,000
GBP
|
— |
| Miscellaneous equity [abstract] | |||||
| Capital redemption reserve |
707,000
GBP
|
707,000
GBP
|
707,000
GBP
|
707,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||||
| Assets |
101,957,000
GBP
|
101,707,000
GBP
|
99,541,000
GBP
|
99,791,000
GBP
|
— |
| Liabilities |
72,036,000
GBP
|
71,786,000
GBP
|
70,805,000
GBP
|
71,055,000
GBP
|
— |
| Assets (liabilities) |
29,921,000
GBP
|
29,921,000
GBP
|
28,736,000
GBP
|
28,736,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||||
| Current assets |
58,404,000
GBP
|
58,404,000
GBP
|
50,349,000
GBP
|
50,349,000
GBP
|
— |
| Current liabilities |
54,118,000
GBP
|
53,868,000
GBP
|
47,543,000
GBP
|
47,793,000
GBP
|
— |
| Current assets (liabilities) |
4,286,000
GBP
|
4,536,000
GBP
|
2,806,000
GBP
|
2,556,000
GBP
|
— |
| Assets less current liabilities [abstract] |