- Companies
- Mechanics and garages
- Harwich
- DH Truck Diagnostics Ltd
DH Truck Diagnostics Ltd
- Company number
- 12535885
- Incorporated
- 26 Mar 20206 years trading
- Registered office
- DH Truck Diagnostics Ltd, Station Approach, Harwich, CO12 3NA
- Nature of business
- Maintenance and repair of motor vehicles
DH Truck Diagnostics Ltd is a 6-year-old private limited company registered in Harwich, company number 12535885, one of 10 vehicle repair garages in Harwich. Companies House shows its accounts as overdue: they were due on 31 March 2026.
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 up £3,336 (+286.4%) on the year before, to £4,501.
- Net assets rose in 3 of 3 year-on-year comparisons on record.
- Current assets of £4,758 against £8,056 owed within a year: 0.6 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 4 years, 2021 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2024 | £4,501 | £4,758 | £8,056 | 1 | |
| 31 Mar 2023 | £1,165 | £3,898 | £4,005 | 1 | |
| 31 Mar 2022 | £638 | £1,162 | £2,110 | 1 | |
| 31 Mar 2021 | £32 | £32 | £1,900 | 1 |
Who runs and owns DH Truck Diagnostics Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| S*** S*** | Director | Sep 2026 |
1 former officer
| Name | Role | Appointed | Left |
|---|---|---|---|
| D*** H*** | Director | Mar 2020 | Sep 2026 |
Person with significant control
Where DH Truck Diagnostics Ltd is registered
The registered office is in Harwich (CO12), in the Tendring local authority area, England. Show CO12 3NA on a map.
Other trade companies in CO12
- Harwich Carpets & Flooring LtdFloor and wall tilers
- Good's Bespoke Interiors LtdBuilders
- PDLM Projects LtdProperty developers
- Weeley MOT and Service Centre LtdMechanics and garages
- Sky-Ri Construction LtdBuilders
- Kentrox LimitedCleaning companies
- HC Landscapes and Groundworks LtdLandscapers and gardeners
- Omega Energy Solutions LtdInstallers
What happens if DH Truck Diagnostics Ltd files late
If the accounts reach Companies House today, the late filing penalty is £1,500 (£3,000 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2026 to 30 Apr 2026 | £150 |
| 1 to 3 months late | 1 May 2026 to 30 Jun 2026 | £375 |
| 3 to 6 months late | 1 Jul 2026 to 30 Sep 2026 | £750 |
| More than 6 months late | From 1 Oct 2026 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2026 | £200 |
| 3 months late | 30 Sep 2026 | another £200 |
| 6 months late | 30 Dec 2026 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 2027 | 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
- 12535885
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 26 March 2020 (6 years ago)
- Registered office
- DH Truck Diagnostics Ltd, Station Approach, Harwich, CO12 3NA
- Nature of business
- Maintenance and repair of motor vehicles (SIC 45200)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2024
- Last confirmation statement
- 15 September 2026
Filing notes for vehicle repair garages
Garages hold parts stock and often own diagnostic equipment and ramps, which qualify for capital allowances.
Similar companies in Harwich
Other active vehicle repair garages registered in Harwich.
- Harwich Commercials Ltd2025
- HMG Vehicle Services Ltd1996
- Ramsey Hill Garage Limited2003
- Roots Motor Group Ltd2020
- The Best Harwich Hand Car Wash Ltd2024
- Weeley MOT and Service Centre Ltd2026
- Ajm Mobile Tyres & Vehicle Repairs Ltd2024
- Bradley's Car Cosmetics Ltd2019
All vehicle repair garages in Harwich · All trades in Harwich · Mechanics and garages across the UK
Frequently asked questions
When are DH Truck Diagnostics Ltd's accounts due?
DH Truck Diagnostics Ltd's accounts were due at Companies House on 31 March 2026 and the register shows them as overdue.
When is DH Truck Diagnostics Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 31 March 2025, due by 31 March 2026, and one for the period to 30 June 2025, due by 30 June 2026. Corporation tax is payable 9 months and 1 day after the end of each.
Is DH Truck Diagnostics Ltd still trading?
DH Truck Diagnostics Ltd is listed as active on the Companies House register (checked 12 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 DH Truck Diagnostics Ltd do?
DH Truck Diagnostics Ltd is registered under Maintenance and repair of motor vehicles (SIC 45200).
How old is DH Truck Diagnostics Ltd?
DH Truck Diagnostics Ltd was incorporated on 26 March 2020, 6 years ago.
Who runs DH Truck Diagnostics Ltd?
DH Truck Diagnostics Ltd has 1 active director, the longest-serving appointed in Sep 2026. Their names and service addresses are on the Companies House register.
Who owns DH Truck Diagnostics Ltd?
One person or company has significant control of DH Truck Diagnostics Ltd: an individual (owns 75% or more of the shares).
What is the penalty if DH Truck Diagnostics 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 DH Truck Diagnostics Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.