Statement Of Financial Position [Abstract]
| Concept |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||
| Property, plant and equipment | — | — | — | — |
31 .7
GBP
|
— | — | — | — |
2 1.1
GBP
|
— | — | — | — | — | — | — | — |
| Right-of-use assets | — | — | — | — |
1 7. 9
GBP
|
— | — | — | — |
7. 3
GBP
|
— | — | — | — | — | — | — | — |
| Deferred tax assets | — | — | — | — |
13,700,000
GBP
|
— | — | — | — |
13 .1
GBP
|
— | — | — | — | — | — | — | — |
| Non-current assets | — | — | — | — |
255,700,000
GBP
|
— | — | — | — |
181. 5
GBP
|
— | — | — | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||||||||
| Current inventories | — | — | — | — |
65,300,000
GBP
|
— | — | — | — |
58,700,000
GBP
|
— | — | — | — | — | — | — | — |
| Trade and other current receivables | — | — | — | — |
10 4. 7
GBP
|
— | — | — | — |
75. 6
GBP
|
— | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — | — |
96,400,000
GBP
|
— | — | — | — |
128 .0
GBP
|
— | — | — | — | — | — | — | — |
| Current assets | — | — | — | — |
268. 2
GBP
|
— | — | — | — |
269. 2
GBP
|
— | — | — | — | — | — | — | — |
| Assets | — | — | — | — |
523. 9
GBP
|
— | — | — | — |
45 0.7
GBP
|
— | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||
| Issued capital | — | — | — | — |
2,900,000
GBP
|
— | — | — | — |
2,900,000
GBP
|
— | — | — | — | — | — | — | — |
| Retained earnings | — | — | — | — |
243. 2
GBP
|
— | — | — | — |
194 .1
GBP
|
— | — | — | — | — | — | — | — |
| Share premium | — | — | — | — |
62 .5
GBP
|
— | — | — | — |
62 .4
GBP
|
— | — | — | — | — | — | — | — |
| Other reserves | — | — | — | — |
0. 2
GBP
|
— | — | — | — |
0. 2
GBP
|
— | — | — | — | — | — | — | — |
| Equity |
2 .9
GBP
|
7. 6
GBP
|
62 .5
GBP
|
243. 2
GBP
|
316. 4
GBP
|
0. 2
GBP
|
6,600,000
GBP
|
19 4.1
GBP
|
0. 2
GBP
|
26 6. 2
GBP
|
2. 9
GBP
|
62 .4
GBP
|
0. 2
GBP
|
11 .5
GBP
|
251 .6
GBP
|
62. 2
GBP
|
2,900,000
GBP
|
1 74 . 8
GBP
|
| Liabilities [abstract] | ||||||||||||||||||
| Non-current liabilities [abstract] | ||||||||||||||||||
| Non-current provisions [abstract] | ||||||||||||||||||
| Non-current provisions | — | — | — | — |
0. 1
GBP
|
— | — | — | — |
700,000
GBP
|
— | — | — | — | — | — | — | — |
| Deferred tax liabilities | — | — | — | — |
15,400,000
GBP
|
— | — | — | — |
4,900,000
GBP
|
— | — | — | — | — | — | — | — |
| Non-current liabilities | — | — | — | — |
32 .0
GBP
|
— | — | — | — |
10 .5
GBP
|
— | — | — | — | — | — | — | — |
| Current liabilities [abstract] | ||||||||||||||||||
| Current provisions [abstract] | ||||||||||||||||||
| Current provisions | — | — | — | — |
7. 7
GBP
|
— | — | — | — |
8 .7
GBP
|
— | — | — | — | — | — | — | — |
| Trade and other current payables | — | — | — | — |
149. 5
GBP
|
— | — | — | — |
1 26. 1
GBP
|
— | — | — | — | — | — | — | — |
| Current liabilities | — | — | — | — |
175 . 5
GBP
|
— | — | — | — |
1 74 . 0
GBP
|
— | — | — | — | — | — | — | — |
| Liabilities | — | — | — | — |
2 0 7. 5
GBP
|
— | — | — | — |
184 .5
GBP
|
— | — | — | — | — | — | — | — |
| Equity and liabilities | — | — | — | — |
523. 9
GBP
|
— | — | — | — |
45 0.7
GBP
|
— | — | — | — | — | — | — | — |