- Companies
- Mechanics and garages
- Basildon
- Diesel Diag UK Ltd
Diesel Diag UK Ltd
- Company number
- 12371722
- Incorporated
- 19 Dec 20196 years trading
- Registered office
- 6 Lords Court, Cricketers Way, Basildon, Essex, SS13 1SS
- Nature of business
- Maintenance and repair of motor vehicles
Diesel Diag UK Ltd is a 6-year-old private limited company registered in Basildon, company number 12371722, one of 100 vehicle repair garages in Basildon. Its next accounts are due at Companies House on 31 October 2027, and the CT600 for the period to 31 January 2027 is due at HMRC on 31 January 2028.
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 £129 (+48.1%) on the year before, to £397.
- Net assets rose in 3 of 5 year-on-year comparisons on record.
- Current assets of £14K against £23K owed within a year: 0.6 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 6 years, 2021 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2026 | £397 | £14K | £23K | 2 | |
| 31 Jan 2025 | £268 | £11K | £17K | 2 | |
| 31 Jan 2024 | £132 | £19K | £24K | 1 | |
| 31 Jan 2023 | £326 | £18K | £22K | 1 | |
| 31 Jan 2022 | £193 | £33K | £33K | 1 | |
| 31 Jan 2021 | £1,976 | £39K | £26K | 1 |
Where Diesel Diag UK Ltd is registered
The registered office is in Basildon (SS13), in the Basildon local authority area, East of England. Show SS13 1SS on a map.
Other trade companies in SS13
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- Asg Boss Construction LtdInstallers
- Bedannr1 LtdElectricians
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- Taps & Traps LimitedPlumbers and heating engineers
Shared registered office
128 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 Diesel Diag UK 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 October 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2027 to 30 Nov 2027 | £150 |
| 1 to 3 months late | 1 Dec 2027 to 31 Jan 2028 | £375 |
| 3 to 6 months late | 1 Feb 2028 to 30 Apr 2028 | £750 |
| More than 6 months late | From 1 May 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2028 | £200 |
| 3 months late | 30 Apr 2028 | another £200 |
| 6 months late | 31 Jul 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 2029 | 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
- 12371722
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 December 2019 (6 years ago)
- Registered office
- 6 Lords Court, Cricketers Way, Basildon, Essex, SS13 1SS
- Nature of business
- Maintenance and repair of motor vehicles (SIC 45200)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 January 2026
- Last confirmation statement
- 17 November 2025
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 Basildon
Other active vehicle repair garages registered in Basildon.
- DM Autocare Ltd2020
- Dma Performance Limited2016
- Dmap Spares Ltd2020
- Donovan Kendall Limited1960
- Dove Trimworks Limited2008
- E.Crowley and Son Limited1957
- Elite Truck & Trailer Repairs Ltd1990
- Essex Autoworks Ltd2023
All vehicle repair garages in Basildon · All trades in Basildon · Mechanics and garages across the UK
Frequently asked questions
When are Diesel Diag UK Ltd's accounts due?
Diesel Diag UK Ltd's next accounts are due at Companies House by 31 October 2027 (in 383 days), covering the period to 31 January 2027.
When is Diesel Diag UK Ltd's CT600 due?
The CT600 for the period to 31 January 2027 is due at HMRC by 31 January 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2027.
Is Diesel Diag UK Ltd still trading?
Diesel Diag UK 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 Diesel Diag UK Ltd do?
Diesel Diag UK Ltd is registered under Maintenance and repair of motor vehicles (SIC 45200).
How old is Diesel Diag UK Ltd?
Diesel Diag UK Ltd was incorporated on 19 December 2019, 6 years ago.
What is the penalty if Diesel Diag UK 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 Diesel Diag UK 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.