S L Engineering Ltd.
Registered name: S L ENGINEERING LTD.
Part of IP Aero1 Holdings Ltd groupS L Engineering Ltd. made £8.1m revenue and £1m profit in the year to 31 Dec 2025.
S L Engineering Ltd.’s revenue grew 9% to £8.1m in the year to 31 Dec 2025, with £1m profit and 78 employees. The company is classified under “manufacture of other fabricated metal products” and is based in Sleaford; we hold 4 years of its filed accounts.
- Status
- Active
- Location
- Sleaford, East Midlands
- Age
- 52 yrs · since 1973
- 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 Dec 2022 | 31 Dec 2023 | 31 Dec 2024 | 31 Dec 2025 |
|---|---|---|---|---|
| Disclosure | No P&L | No P&L | Full P&L | Full P&L |
| Profit & loss | ||||
| Revenue (turnover) | — | — | £7.4m | £8.1m |
| Cost of sales | — | — | £4.5m | £4.4m |
| Gross profit | — | — | £3m | £3.6m |
| Operating profit | — | — | £994k | £1.4m |
| Profit before tax | — | — | £928k | £1.3m |
| Profit after tax | — | — | £604k | £1m |
| Profit (best available) | — | — | £604k | £1m |
| Staff costs | — | — | £3m | £3.4m |
| Employees (average) | 70 | 70 | 74 | 78 |
| Ratios | ||||
| Profit margin | — | — | 8.1% | 12.5% |
| Gross margin | — | — | 40% | 45.1% |
| Revenue per employee | — | — | £100k | £103k |
| Profit per employee | — | — | £8.2k | £12.9k |
| Cash conversion | — | — | 75.4% | 55% |
| Growth (year on year) | ||||
| Revenue growth | — | — | — | ▲8.7% |
| Profit growth | — | — | — | ▲66.6% |
| Headcount growth | — | 0% | ▲5.7% | ▲5.4% |
| Balance sheet — indirect signals, not revenue | ||||
| Cash at bank | £43.3k | £6.2k | £10.9k | £12.3k |
| Net assets | £801k | £1.2m | £2.2m | £3.2m |
| Fixed assets | £740k | £912k | £1.4m | £1.3m |
| Current assets | £2.8m | £3.2m | £4m | £4.5m |
| Debtors | £870k | £1.2m | £1.4m | £1.2m |
| Deferred income | — | — | £153k | £306k |
| Cash from operations | — | — | £750k | £774k |
| Source | FullAccounts · bulk data May 2024 | FullAccounts · bulk data May 2024 | FullAccounts · bulk data Jul 2025 | FullAccounts · bulk data Aug 2026 |
How the business works
- Profit margin
- 12.5%
- Profit ÷ revenue.
- Gross margin
- 45.1%
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- £103k
- Revenue ÷ average employees.
- Profit per employee
- £12.9k
- Profit ÷ average employees.
- Cash conversion
- 55%
- Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
- Fixed assets ÷ revenue
- 16.4%
- Capital intensity. Low = capital-light, cheaper to start.
- Deferred income ÷ revenue
- 3.8%
- Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
- Debtors ÷ revenue
- 14.7%
- 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
- ▲44%
- Now £3.2m
- Cash at bank
- ▲13%
- Now £12.3k
- Headcount
- ▲5%
- Now 78
- Deferred income
- ▲100%
- Now £306k
- Fixed assets
- ▼4%
- Now £1.3m
Deferred income is reported together with accruals in this filing (“accruals and deferred income”), so it is an approximate signal only.
Group structure
Ownership chain
- IP Aero1 Holdings Ltdultimate parent75–100%
- IP Aero1 Bidco Limited75–100%
- S L Engineering Ltd.this 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).
Similar profitable businesses
- Tecnair Manufacturing Company LimitedShipley · Manufacture of other fabricated metal products n.e.c.
- Revenue
- £8.1m
- Profit
- £385k
- Staff
- 61
- Bozeat Industrial LimitedWellingborough · Manufacture of other fabricated metal products n.e.c.
- Revenue
- £8.2m
- Profit
- £596k
- Staff
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- Renown Engineering LimitedCramlington · Manufacture of other fabricated metal products n.e.c.
- Revenue
- £7.9m
- Profit
- £95.2k
- Staff
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- Gilcrest Manufacturing LimitedBristol · Manufacture of other fabricated metal products n.e.c.
- Revenue
- £7.8m
- Profit
- £952k
- Staff
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- Collis Engineering LimitedAlfreton · Manufacture of other fabricated metal products n.e.c.
- Revenue
- £8.5m
- Profit
- £132k
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- A & G Precision and Sons LimitedPreston · Manufacture of other fabricated metal products n.e.c.
- Revenue
- £8.5m
- Profit
- £1.3m
- Staff
- 72
Sources
Latest figures from FullAccounts for the year to 31 Dec 2025 (profit £1m), from the Companies House accounts bulk data published Aug 2026. 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.