Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2022-03-31 |
|---|---|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||||
| Property, plant and equipment [abstract] | |||||
| Property, plant and equipment |
38,714,000
GBP
|
38,714,000
GBP
|
38,145,000
GBP
|
38,145,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||||
| Goodwill |
286,000
GBP
|
286,000
GBP
|
286,000
GBP
|
286,000
GBP
|
— |
| Investment property [abstract] | |||||
| Investment property |
7,216,000
GBP
|
7,216,000
GBP
|
7,531,000
GBP
|
7,531,000
GBP
|
— |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | |||||
| Investments in subsidiaries reported in separate financial statements |
–
GBP
|
250,000
GBP
|
–
GBP
|
250,000
GBP
|
— |
| Miscellaneous non-current assets [abstract] | |||||
| Non-current finance lease receivables |
65,000
GBP
|
65,000
GBP
|
225,000
GBP
|
225,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||||
| Trade and other current receivables |
7,310,000
GBP
|
7,310,000
GBP
|
7,121,000
GBP
|
7,121,000
GBP
|
— |
| Classes of current inventories [abstract] | |||||
| Current inventories |
42,251,000
GBP
|
42,251,000
GBP
|
39,989,000
GBP
|
39,989,000
GBP
|
— |
| Classes of current inventories, alternative [abstract] | |||||
| Cash and cash equivalents [abstract] | |||||
| Cash and cash equivalents |
438,000
GBP
|
438,000
GBP
|
4,226,000
GBP
|
4,226,000
GBP
|
2,759,000
GBP
|
| Miscellaneous current assets [abstract] | |||||
| Current finance lease receivables |
160,000
GBP
|
160,000
GBP
|
164,000
GBP
|
164,000
GBP
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||||
| Non-current portion of non-current loans received |
10,308,000
GBP
|
10,308,000
GBP
|
10,437,000
GBP
|
10,437,000
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
|
1,875,000
GBP
|
1,875,000
GBP
|
— |
| Trade and other current payables [abstract] | |||||
| Trade and other current payables |
45,597,000
GBP
|
45,847,000
GBP
|
43,674,000
GBP
|
43,924,000
GBP
|
— |
| Miscellaneous non-current liabilities [abstract] | |||||
| Non-current net defined benefit liability |
10,036,000
GBP
|
10,036,000
GBP
|
8,799,000
GBP
|
8,799,000
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 |
24,594,000
GBP
|
24,594,000
GBP
|
27,520,000
GBP
|
27,520,000
GBP
|
— |
| Miscellaneous equity [abstract] | |||||
| Capital redemption reserve |
707,000
GBP
|
707,000
GBP
|
707,000
GBP
|
707,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||||
| Assets |
99,541,000
GBP
|
99,791,000
GBP
|
100,035,000
GBP
|
100,285,000
GBP
|
— |
| Liabilities |
70,805,000
GBP
|
71,055,000
GBP
|
68,373,000
GBP
|
68,623,000
GBP
|
— |
| Assets (liabilities) |
28,736,000
GBP
|
28,736,000
GBP
|
31,662,000
GBP
|
31,662,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||||
| Current assets |
50,349,000
GBP
|
50,349,000
GBP
|
51,500,000
GBP
|
51,500,000
GBP
|
— |
| Current liabilities |
47,543,000
GBP
|
47,793,000
GBP
|
46,088,000
GBP
|
46,338,000
GBP
|
— |
| Current assets (liabilities) |
2,806,000
GBP
|
2,556,000
GBP
|
5,412,000
GBP
|
5,162,000
GBP
|
— |
| Assets less current liabilities [abstract] |