First Diesel Injection (Croydon) Limited
Registered name: FIRST DIESEL INJECTION (CROYDON) LIMITED
Part of First Diesel Injection Limited groupFirst Diesel Injection (Croydon) Limited made £150k revenue and £124k profit in the year to 31 Mar 2025.
First Diesel Injection (Croydon) Limited’s revenue grew 34% to £150k in the year to 31 Mar 2025, with £124k profit and 2 employees. The company is classified under “maintenance and repair of motor vehicles” and is based in London; we hold 4 years of its filed accounts.
- Status
- Active
- Location
- London, London
- Age
- 73 yrs · since 1953
- Type
- Private Limited Company
Part of a group. The filing indicates this company sits within a group structure, so its results may depend on intra-group trading and it may be hard to replicate independently.
Key figures
Badges are automated estimates derived from the filed figures — not statements of fact about the company.
Financial history
| Year to | 31 Mar 2022 | 31 Mar 2023 | 31 Mar 2024 | 31 Mar 2025 |
|---|---|---|---|---|
| Disclosure | No P&L | No P&L | Full P&L | Full P&L |
| Profit & loss | ||||
| Revenue (turnover) | — | — | £112k | £150k |
| Cost of sales | — | — | £98.7k | £92k |
| Gross profit | — | — | £13.2k | £58.2k |
| Profit before tax | — | — | −£20.4k | £124k |
| Profit after tax | — | — | −£20.4k | £124k |
| Profit (best available) | — | — | −£20.4k | £124k |
| Employees (average) | 6 | 6 | 2 | 2 |
| Ratios | ||||
| Profit margin | — | — | −18.3% | 82.4% |
| Gross margin | — | — | 11.8% | 38.7% |
| Revenue per employee | — | — | £55.9k | £75.1k |
| Profit per employee | — | — | −£10.2k | £61.9k |
| Growth (year on year) | ||||
| Revenue growth | — | — | — | ▲34.3% |
| Headcount growth | — | 0% | ▼66.7% | 0% |
| Balance sheet — indirect signals, not revenue | ||||
| Cash at bank | £12.9k | £10.5k | £3.5k | £6.6k |
| Net assets | −£28.2k | −£76.3k | −£96.8k | £27k |
| Fixed assets | £895 | £671 | — | — |
| Current assets | £50.4k | £37k | £88.5k | £96.4k |
| Debtors | £27.7k | £161 | £60k | £69.8k |
| Source | Accounts · bulk data Oct 2023 | Accounts · bulk data Oct 2023 | FilletedAccounts · bulk data Dec 2024 | FullAccounts · bulk data Oct 2025 |
How the business works
- Profit margin
- 82.4%
- Profit ÷ revenue.
- Gross margin
- 38.7%
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- £75.1k
- Revenue ÷ average employees.
- Profit per employee
- £61.9k
- Profit ÷ average employees.
- Cash conversion
- —
- Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
- Fixed assets ÷ revenue
- —
- Capital intensity. Low = capital-light, cheaper to start.
- Deferred income ÷ revenue
- —
- Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
- Debtors ÷ revenue
- 46.5%
- Money owed by customers. Low = customers pay quickly.
Balance-sheet signals
Year-on-year changes in filed balance-sheet items. They can hint at momentum (or investment) but are not revenue or profit and must not be read as such.
- Net assets
- —
- Now £27k
- Cash at bank
- ▲90%
- Now £6.6k
- Headcount
- 0%
- Now 2
- Deferred income
- —
- Now —
- Fixed assets
- —
- Now —
Group structure
Ownership chain
- First Diesel Injection Limitedultimate parent75–100%
- First Diesel Injection (Croydon) Limitedthis company
Bands show the share of ownership each company holds in the one below it.
From the Persons with Significant Control register (corporate controllers only).
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Sources
Latest figures from FullAccounts for the year to 31 Mar 2025 (profit £124k), from the Companies House accounts bulk data published Oct 2025. Spotted an error? Request a correction.
Contains public sector information from Companies House licensed under the Open Government Licence v3.0. Data from Companies House, © Crown copyright. View the licence.