- Companies
- Specialist contractors
- Wisbech
- A1 Air Testing Limited
A1 Air Testing Limited
- Company number
- 11851468
- Incorporated
- 28 Feb 20197 years trading
- Registered office
- 42 Back Road, Gorefield, Wisbech, Cambridgeshire, PE13 4PE
- Nature of business
- Other specialised construction activities n.e.c.
A1 Air Testing Limited is a 7-year-old private limited company registered in Wisbech, company number 11851468, one of 29 specialist construction companies in Wisbech. Its next accounts are due at Companies House on 30 November 2026, and the CT600 for the period to 28 February 2026 is due at HMRC on 28 February 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets down £760 (-2.3%) on the year before, to £33K.
- Net assets rose in 3 of 5 year-on-year comparisons on record.
- Current assets of £23K against £3,194 owed within a year: 7.2 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Feb 2025 | £33K | £23K | £3,194 | 2 | |
| 28 Feb 2024 | £34K | £23K | £4,748 | 2 | |
| 28 Feb 2023 | £48K | £36K | £5,708 | 2 | |
| 28 Feb 2022 | £41K | £29K | £4,520 | 5 | |
| 28 Feb 2021 | £32K | £24K | £8,907 | 5 | |
| 28 Feb 2020 | £13K | £4,000 | £5,895 | 5 |
Where A1 Air Testing Limited is registered
The registered office is in Wisbech (PE13), in the Fenland local authority area, East of England. Show PE13 4PE on a map.
Other trade companies in PE13
- Tom's Climate Solutions LtdPlumbers and heating engineers
- Aj's Glass & Glazing LtdGlaziers
- Gordon Garage Doors LimitedInstallers
- JC Fisher Painting, Decorating and Interiors LtdBuilders
- JJ Leccys LtdMotor traders
- Edpm Roofing Company LimitedRoofers
- S10 Outdoor Living LtdLandscapers and gardeners
- CHCT Signs LimitedInstallers
What happens if A1 Air Testing Limited files late
Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 30 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2026 to 31 Dec 2026 | £150 |
| 1 to 3 months late | 1 Jan 2027 to 28 Feb 2027 | £375 |
| 3 to 6 months late | 1 Mar 2027 to 31 May 2027 | £750 |
| More than 6 months late | From 1 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 2028 | another 10% of any unpaid tax |
For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.
Company details
As held on the Companies House register.
- Company number
- 11851468
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 28 February 2019 (7 years ago)
- Registered office
- 42 Back Road, Gorefield, Wisbech, Cambridgeshire, PE13 4PE
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 28 February (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 27 February 2026
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Wisbech
Other active specialist construction companies registered in Wisbech.
- All Timber Infestation & Consultancy Services Limited1978
- Arcus Products Limited2015
- B. J. Plant Hire Limited2007
- BW Damp Proofing Limited2024
- CBD Boarding Limited2024
- Chris Wiles Damp Proofing Limited2023
- David Pritchard Limited2014
- Drake Towage Limited1995
All specialist construction companies in Wisbech · All trades in Wisbech · Specialist contractors across the UK
Frequently asked questions
When are A1 Air Testing Limited's accounts due?
A1 Air Testing Limited's next accounts are due at Companies House by 30 November 2026 (in 49 days), covering the period to 28 February 2026.
When is A1 Air Testing Limited's CT600 due?
The CT600 for the period to 28 February 2026 is due at HMRC by 28 February 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2026.
Is A1 Air Testing Limited still trading?
A1 Air Testing Limited is listed as active on the Companies House register as of 1 Oct 2026. Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.
What does A1 Air Testing Limited do?
A1 Air Testing Limited is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is A1 Air Testing Limited?
A1 Air Testing Limited was incorporated on 28 February 2019, 7 years ago.
What is the penalty if A1 Air Testing Limited files its accounts late?
Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.
Official records
View A1 Air Testing Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.