- Companies
- Motor traders
- Swansea
- South Wales Diesels Ltd
South Wales Diesels Ltd
- Company number
- 12129310
- Incorporated
- 30 Jul 20197 years trading
- Registered office
- Bank Top Garage Pontardulais Road, Fforestfach, Swansea, West Glamorgan, SA5 4BA
- Nature of business
- Sale of other motor vehicles; Retail trade of motor vehicle parts and accessories
South Wales Diesels Ltd is a 7-year-old private limited company registered in Swansea, company number 12129310, one of 128 motor trade companies in Swansea. 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 up £6,956 (+12.9%) on the year before, to £61K.
- Net assets rose in 5 of 5 year-on-year comparisons on record.
- Current assets of £107K against £17K owed within a year: 6.3 times cover.
- 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 Jul 2025 | £61K | £93K | £107K | £17K | 0 |
| 31 Jul 2024 | £54K | £75K | £98K | £14K | 1 |
| 31 Jul 2023 | £44K | £62K | £88K | £14K | 1 |
| 31 Jul 2022 | £34K | £60K | £81K | £18K | 1 |
| 31 Jul 2021 | £26K | £69K | £74K | £19K | 1 |
| 31 Jul 2020 | £1,694 | £49K | £55K | £25K | 1 |
Where South Wales Diesels Ltd is registered
The registered office is in Swansea (SA5), in the Swansea local authority area, Wales. Show SA5 4BA on a map.
Other trade companies in SA5
- Lee.T73 Rail LtdCivil engineering
- LJ Cleaning Swansea LimitedCleaning companies
- Same Day Roof Repairs Swansea LtdRoofers
- Warlow&Co LimitedProperty developers
- RNJ Vehicle Repairs LtdMechanics and garages
- Erj's Recovery and Transportation LtdMotor traders
- Brandrick Group LimitedElectricians
- Chris Chambers Holdings LimitedElectricians
Also registered at this address
1 other company uses the same registered office as South Wales Diesels Ltd.
- Fforest Auto Swansea Ltd.Mechanics and garages
What happens if South Wales Diesels 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 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
- 12129310
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 30 July 2019 (7 years ago)
- Registered office
- Bank Top Garage Pontardulais Road, Fforestfach, Swansea, West Glamorgan, SA5 4BA
- Nature of business
- Sale of other motor vehicles (SIC 45190)
Retail trade of motor vehicle parts and accessories (SIC 45320) - Year end
- 31 July (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 29 July 2026
Filing notes for motor trade companies
Motor trade companies hold vehicle stock, and how that stock is valued at the year end moves the profit directly. Some use the VAT margin scheme.
Similar companies in Swansea
Other active motor trade companies registered in Swansea.
- South Wales Vehicle Security Ltd2022
- Sultan Car Sales Ltd2023
- Swan Tyres Limited2025
- Swansea Radiators and Autoparts Limited2003
- Swansea Trade Sales Limited2016
- Swansea Tyre Place Limited2017
- Swansea Vale 4 X 4 Limited2020
- Swansea Valley Exhaust and Tyre Centre Limited2014
All motor trade companies in Swansea · All trades in Swansea · Motor traders across the UK
Frequently asked questions
When are South Wales Diesels Ltd's accounts due?
South Wales Diesels Ltd's next accounts are due at Companies House by 30 April 2027 (in 199 days), covering the period to 31 July 2026.
When is South Wales Diesels Ltd'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 South Wales Diesels Ltd still trading?
South Wales Diesels 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 South Wales Diesels Ltd do?
South Wales Diesels Ltd is registered under Sale of other motor vehicles (SIC 45190); Retail trade of motor vehicle parts and accessories (SIC 45320).
How old is South Wales Diesels Ltd?
South Wales Diesels Ltd was incorporated on 30 July 2019, 7 years ago.
What is the penalty if South Wales Diesels 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 South Wales Diesels 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.