- Companies
- Machinery repair and installation
- London
- Zenox Aviation Ltd
Zenox Aviation Ltd
- Company number
- 11858499
- Incorporated
- 4 Mar 20197 years trading
- Registered office
- 128 City Road, London, EC1V 2NX
- Nature of business
- Repair and maintenance of aircraft and spacecraft; Other engineering activities; Other research and experimental development on natural sciences and engineering; Investigation activities
Zenox Aviation Ltd is a 7-year-old private limited company registered in London, company number 11858499, one of 1,743 machinery repair and installation companies in London. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 £66 (-14.3%) on the year before, to £395.
- Net assets rose in 0 of 5 year-on-year comparisons on record.
- No employees reported for the latest year (directors are often not counted as employees).
- 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 |
|---|---|---|---|---|---|
| 31 Mar 2025 | £395 | £333 | £0 | 0 | |
| 31 Mar 2024 | £461 | £401 | £0 | 0 | |
| 31 Mar 2023 | £529 | £469 | 0 | ||
| 31 Mar 2022 | £627 | £632 | £0 | 0 | |
| 31 Mar 2021 | £762 | £632 | £0 | 1 | |
| 31 Mar 2020 | £917 | £916 | £0 | 1 |
Who runs and owns Zenox Aviation Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (2)
| Name | Role | Appointed |
|---|---|---|
| P*** K*** | Director | Mar 2019 |
| P*** K*** | Secretary | Mar 2019 |
Person with significant control
Where Zenox Aviation Ltd is registered
The registered office is in London (EC1V), in the Islington local authority area, London. Show EC1V 2NX on a map.
Other trade companies in EC1V
- Cardiff Electrical Solutions LtdElectricians
- Edemis Construction LtdBuilders
- Zaylan LtdProperty developers
- Pronto Roofing and Construction LtdRoofers
- Instal Systems LtdPlumbers and heating engineers
- J&R Partners LtdBuilders
- The Tile Craft LtdFinishing trades
- Cathal Od Solutions LtdSpecialist contractors
Shared registered office
2,436 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Zenox Aviation Ltd 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 31 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 11858499
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 March 2019 (7 years ago)
- Registered office
- 128 City Road, London, EC1V 2NX
- Nature of business
- Repair and maintenance of aircraft and spacecraft (SIC 33160)
Other engineering activities (SIC 71129)
Other research and experimental development on natural sciences and engineering (SIC 72190)
Investigation activities (SIC 80300) - Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 15 March 2026
Filing notes for machinery repair and installation companies
Machinery repair and installation companies often carry parts stock and specialist tools, and many work on contracts that span the year end.
Similar companies in London
Other active machinery repair and installation companies registered in London.
- Zero Degrees Refrigeration & Airconditioning Ltd2004
- Zeus Services and Maintenance Ltd2024
- ZNS Feather Ltd2021
- 032 Miriko Limited2021
- 1 Stop 4 Tyres Limited2016
- 1. Osnabrucker Stromservice Agentur Limited2009
- 100% Invoice Ltd2026
- 12Thfret Ltd2008
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Frequently asked questions
When are Zenox Aviation Ltd's accounts due?
Zenox Aviation Ltd's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Zenox Aviation Ltd's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Zenox Aviation Ltd still trading?
Zenox Aviation Ltd 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 Zenox Aviation Ltd do?
Zenox Aviation Ltd is registered under Repair and maintenance of aircraft and spacecraft (SIC 33160); Other engineering activities (SIC 71129); Other research and experimental development on natural sciences and engineering (SIC 72190); Investigation activities (SIC 80300).
How old is Zenox Aviation Ltd?
Zenox Aviation Ltd was incorporated on 4 March 2019, 7 years ago.
Who runs Zenox Aviation Ltd?
Zenox Aviation Ltd has 1 active director, the longest-serving appointed in Mar 2019. Their names and service addresses are on the Companies House register.
Who owns Zenox Aviation Ltd?
One person or company has significant control of Zenox Aviation Ltd: an individual (owns 75% or more of the shares).
What is the penalty if Zenox Aviation Ltd 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 Zenox Aviation Ltd 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.