- Companies
- Mechanics and garages
- Swansea
- South Wales Diesel Specialists Limited
South Wales Diesel Specialists Limited
- Company number
- 15079130
- Incorporated
- 17 Aug 20233 years trading
- Registered office
- Mha House Charter Court, Phoenix Way, Swansea Enterprise Park, Swansea, SA7 9FS
- Nature of business
- Maintenance and repair of motor vehicles; Wholesale trade of motor vehicle parts and accessories
South Wales Diesel Specialists Limited is a 3-year-old private limited company registered in Swansea, company number 15079130, one of 154 vehicle repair garages in Swansea. Its next accounts are due at Companies House on 27 November 2026, and its first CT600 is due at HMRC on 31 August 2026.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Where South Wales Diesel Specialists Limited is registered
The registered office is in Swansea (SA7), in the Swansea local authority area, Wales. Show SA7 9FS on a map.
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Also registered at this address
9 other companies use the same registered office as South Wales Diesel Specialists Limited.
- Arthur Reginald Construction LimitedInstallers
- Asw Energy Services LimitedPlumbers and heating engineers
- Elev8 Scaffolding (South Wales) LimitedScaffolders
- Groesffordd Homes LtdBuilders
- JC Levels LimitedInstallers
- JLR Construction & Engineering LtdBuilders
- LMS (Wales) LimitedSpecialist contractors
- Peter Nicholas & Sons LtdRoofers
- R Powell Properties LtdProperty developers
What happens if South Wales Diesel Specialists 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 27 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 28 Nov 2026 to 27 Dec 2026 | £150 |
| 1 to 3 months late | 28 Dec 2026 to 27 Feb 2027 | £375 |
| 3 to 6 months late | 28 Feb 2027 to 27 May 2027 | £750 |
| More than 6 months late | From 28 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 28 Feb 2027 | £200 |
| 3 months late | 27 May 2027 | another £200 |
| 6 months late | 27 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 27 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
- 15079130
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 17 August 2023 (3 years ago)
- Registered office
- Mha House Charter Court, Phoenix Way, Swansea Enterprise Park, Swansea, SA7 9FS
- Nature of business
- Maintenance and repair of motor vehicles (SIC 45200)
Wholesale trade of motor vehicle parts and accessories (SIC 45310) - Year end
- 30 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 August 2024
- Last confirmation statement
- 18 August 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 Swansea
Other active vehicle repair garages registered in Swansea.
- South West Injector Removal Service Ltd2024
- Sparkling Cars Ltd2020
- SPB Motors Ltd2025
- Sunnyside Autos (Gorseinon) Limited2002
- Swansea Bert MOT Limited2023
- Swansea Volkswagen Centre Limited2023
- T W K Thomas & Son Limited1999
- Tawe MOT & Repair Centre Ltd2018
All vehicle repair garages in Swansea · All trades in Swansea · Mechanics and garages across the UK
Frequently asked questions
When are South Wales Diesel Specialists Limited's accounts due?
South Wales Diesel Specialists Limited's next accounts are due at Companies House by 27 November 2026 (in 45 days), covering the period to 27 February 2026.
When is South Wales Diesel Specialists Limited'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 August 2025, due by 31 August 2026, and one for the period to 27 February 2026, due by 27 February 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is South Wales Diesel Specialists Limited still trading?
South Wales Diesel Specialists Limited is listed as active on the Companies House register (checked 13 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 South Wales Diesel Specialists Limited do?
South Wales Diesel Specialists Limited is registered under Maintenance and repair of motor vehicles (SIC 45200); Wholesale trade of motor vehicle parts and accessories (SIC 45310).
How old is South Wales Diesel Specialists Limited?
South Wales Diesel Specialists Limited was incorporated on 17 August 2023, 3 years ago.
What is the penalty if South Wales Diesel Specialists 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 South Wales Diesel Specialists Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.