- Companies
- Machinery repair and installation
- Ammanford
- Thorneycroft Boiler Maintenance Limited
Thorneycroft Boiler Maintenance Limited
- Company number
- 05388698
- Incorporated
- 10 Mar 200521 years trading
- Registered office
- 141 Penygroes Road, Blaenau, Ammanford, Carmarthenshire, SA18 3BQ
- Nature of business
- Repair of fabricated metal products
Thorneycroft Boiler Maintenance Limited is a 21-year-old private limited company registered in Ammanford, company number 05388698, one of 9 machinery repair and installation companies in Ammanford. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 £24K (+130.9%) on the year before, to £42K.
- Net assets rose in 4 of 5 year-on-year comparisons on record.
- Current assets of £50K against £20K owed within a year: 2.5 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 Mar 2025 | £42K | £50K | £20K | 0 | |
| 31 Mar 2024 | £18K | £35K | £29K | 2 | |
| 31 Mar 2023 | £13K | £36K | £30K | 3 | |
| 31 Mar 2022 | £11K | £40K | £31K | 3 | |
| 31 Mar 2021 | £18K | £55K | £43K | 3 | |
| 31 Mar 2020 | £1,941 | £26K | £31K | 3 |
Where Thorneycroft Boiler Maintenance Limited is registered
The registered office is in Ammanford (SA18), in the Carmarthenshire local authority area, Wales. Show SA18 3BQ on a map.
Other trade companies in SA18
- Ace Resin Group LtdFinishing trades
- Dyfed Engineering LtdElectricians
- Serval Mechanical & Fabrication LtdMechanics and garages
- Timber and Trade Solutions LtdBuilders
- West Wales Cleaning Group LtdCleaning companies
- Carpet Confession LtdCleaning companies
- Elite Painting Solutions LtdPainters and decorators
- Dafku Construction LtdCivil engineering
What happens if Thorneycroft Boiler Maintenance 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 31 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 05388698
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 10 March 2005 (21 years ago)
- Registered office
- 141 Penygroes Road, Blaenau, Ammanford, Carmarthenshire, SA18 3BQ
- Nature of business
- Repair of fabricated metal products (SIC 33110)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 10 March 2026
Filing notes for machinery repair and installation companies
Machinery repair and installation companies often carry parts stock and specialist tools, and many work on contracts that span the year end.
Similar companies in Ammanford
Other active machinery repair and installation companies registered in Ammanford.
- Tmorris Aviation Ltd2016
- A & D Davies Engineering Ltd2024
- Bootec Ltd2003
- Coffee Gear Ltd2011
- Jettycare Ltd2026
- Meosmo Ltd2014
- P & S Biggs Ltd2013
- Pneumatic Solutions Ltd2003
All machinery repair and installation companies in Ammanford · All trades in Ammanford · Machinery repair and installation across the UK
Frequently asked questions
When are Thorneycroft Boiler Maintenance Limited's accounts due?
Thorneycroft Boiler Maintenance Limited's next accounts are due at Companies House by 31 December 2026 (in 78 days), covering the period to 31 March 2026.
When is Thorneycroft Boiler Maintenance Limited's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Thorneycroft Boiler Maintenance Limited still trading?
Thorneycroft Boiler Maintenance 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 Thorneycroft Boiler Maintenance Limited do?
Thorneycroft Boiler Maintenance Limited is registered under Repair of fabricated metal products (SIC 33110).
How old is Thorneycroft Boiler Maintenance Limited?
Thorneycroft Boiler Maintenance Limited was incorporated on 10 March 2005, 21 years ago.
What is the penalty if Thorneycroft Boiler Maintenance 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 Thorneycroft Boiler Maintenance 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.