- Companies
- Plumbers and heating engineers
- Coventry
- Sentinel Gas Systems Limited
Sentinel Gas Systems Limited
- Company number
- 09152415
- Incorporated
- 29 Jul 201412 years trading
- Registered office
- 4A, 2-4 Wolfe Road, Coventry, West Midlands, CV4 9UP
- Nature of business
- Plumbing, heat and air-conditioning installation
Sentinel Gas Systems Limited is a 12-year-old private limited company registered in Coventry, company number 09152415, one of 190 plumbing and heating companies in Coventry. Its next accounts are due at Companies House on 30 April 2027, and the CT600 for the period to 31 July 2026 is due at HMRC on 31 July 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 £420K (-58.4%) on the year before, to £299K.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £1M against £1M owed within a year: 1.0 times cover.
- 14 employees on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jul 2025 | £299K | £398K | £1M | £1M | 14 |
| 31 Jul 2024 | £720K | £284K | £994K | £656K | 14 |
| 31 Jul 2023 | £584K | £98K | £924K | £670K | 14 |
| 31 Jul 2022 | £424K | £186K | £429K | £136K | 9 |
| 31 Jul 2021 | £522K | £358K | £480K | £91K | 8 |
| 31 Jul 2020 | £425K | £119K | £405K | £111K | 8 |
| 31 Jul 2019 | £412K | £438K | £581K | £274K | 7 |
| 31 Jul 2018 | £219K | £39K | £249K | £135K | 6 |
| 31 Jul 2017 | -£124K | -£215K | £146K | 6 | |
| 31 Jul 2016 | £43K | £213K | £215K |
Who runs and owns Sentinel Gas Systems Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| S*** K*** | Director | Jul 2014 |
1 former officer
| Name | Role | Appointed | Left |
|---|---|---|---|
| R*** B*** | Director | Jul 2014 | Oct 2024 |
People with significant control (2)
Public contracts won
Sentinel Gas Systems Limited has 2 public sector contract awards on record; the ones with their own published value total £30K, from 2023 to 2025. Source: Contracts Finder and Find a Tender award notices. For 1 of them the published figure is a shared or multi-year ceiling (a framework place, a multi-supplier award, or more than a small company could hold alone), so no value is shown. 1 of these were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- Devon County Council1 award
- The University of Birmingham1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Devon County Council | CP2549-24: Devon and Somerset Standing List of Approved Contractors (SLoAC) 2025 | Ceiling, not shown | 4 Apr 2025 |
| The University of Birmingham | Supply and Installation of Ammonia G90 Asecos Gas Cabinet | £30K | 25 Oct 2023 |
Where Sentinel Gas Systems Limited is registered
The registered office is in Coventry (CV4), in the Coventry local authority area, West Midlands. Show CV4 9UP on a map.
Other trade companies in CV4
- 180 Property Group LtdProperty developers
- Four Pillar Estates LtdProperty developers
- Top Automobiles LtdMotor traders
- Coventry Cooling LtdPlumbers and heating engineers
- McMahon Renovations LtdBuilders
- LJB Air Conditioning LtdPlumbers and heating engineers
- BTS Tyres LtdMotor traders
- Datojeli LtdCivil engineering
What happens if Sentinel Gas Systems 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 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 May 2027 to 31 May 2027 | £150 |
| 1 to 3 months late | 1 Jun 2027 to 31 Jul 2027 | £375 |
| 3 to 6 months late | 1 Aug 2027 to 31 Oct 2027 | £750 |
| More than 6 months late | From 1 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- 09152415
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 July 2014 (12 years ago)
- Registered office
- 4A, 2-4 Wolfe Road, Coventry, West Midlands, CV4 9UP
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 July (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 28 February 2026
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in Coventry
Other active plumbing and heating companies registered in Coventry.
- Simply Warm Limited2023
- Skyline Heating Ltd2023
- Smart Gas Eng Ltd2021
- SPH Cov Ltd2019
- Stanley Heating & Plumbing Services Limited2021
- STM Plumbing & Heating (UK) Limited2006
- Storer Plumbing and Heating Ltd2021
- T.W.E. Gas Solution’S Ltd2025
All plumbing and heating companies in Coventry · All trades in Coventry · Plumbers and heating engineers across the UK
Frequently asked questions
When are Sentinel Gas Systems Limited's accounts due?
Sentinel Gas Systems Limited's next accounts are due at Companies House by 30 April 2027 (in 199 days), covering the period to 31 July 2026.
When is Sentinel Gas Systems Limited's CT600 due?
The CT600 for the period to 31 July 2026 is due at HMRC by 31 July 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 May 2027.
Is Sentinel Gas Systems Limited still trading?
Sentinel Gas Systems 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 Sentinel Gas Systems Limited do?
Sentinel Gas Systems Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Sentinel Gas Systems Limited?
Sentinel Gas Systems Limited was incorporated on 29 July 2014, 12 years ago.
Who runs Sentinel Gas Systems Limited?
Sentinel Gas Systems Limited has 1 active director, the longest-serving appointed in Jul 2014. Their names and service addresses are on the Companies House register.
Who owns Sentinel Gas Systems Limited?
2 people or companies have significant control of Sentinel Gas Systems Limited: an individual (owns 25% to 50% of the shares); an individual (owns 25% to 50% of the shares).
Has Sentinel Gas Systems Limited won public sector contracts?
Yes. Sentinel Gas Systems Limited has 2 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £30K), most recently from Devon County Council.
What is the penalty if Sentinel Gas Systems 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 Sentinel Gas Systems 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.