- Companies
- Machinery repair and installation
- Llanelli
- Celtic Instrumentation Ltd
Celtic Instrumentation Ltd
- Company number
- 03092822
- Incorporated
- 18 Aug 199531 years trading
- Registered office
- 6 Coalbrook Road, Pontyberem, Llanelli, SA15 5HU
- Nature of business
- Installation of industrial machinery and equipment; Agents specialized in the sale of other particular products; Engineering related scientific and technical consulting activities
Celtic Instrumentation Ltd is a 31-year-old private limited company registered in Llanelli, company number 03092822, one of 16 machinery repair and installation companies in Llanelli. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 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 £1,752 (+9.1%) on the year before, to £21K.
- Net assets rose in 3 of 9 year-on-year comparisons on record.
- Current assets of £31K against £12K owed within a year: 2.7 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2025 | £21K | £31K | £12K | 1 | |
| 30 Nov 2024 | £19K | £30K | £11K | 1 | |
| 30 Nov 2023 | £22K | £32K | £8,691 | 1 | |
| 30 Nov 2022 | £34K | £41K | £5,063 | 1 | |
| 30 Nov 2021 | £36K | £29K | £46K | £4,298 | 1 |
| 30 Nov 2020 | £42K | £38K | £55K | £3,921 | 1 |
| 30 Nov 2019 | £37K | £12K | £32K | £2,840 | 1 |
| 30 Nov 2018 | £44K | £11K | £33K | £1,869 | 1 |
| 30 Nov 2017 | £52K | £11K | £34K | £2,389 | 1 |
| 30 Nov 2016 | £48K | £14K | £22K | £3,915 |
Where Celtic Instrumentation Ltd is registered
The registered office is in Llanelli (SA15), in the Carmarthenshire local authority area, Wales. Show SA15 5HU on a map.
Other trade companies in SA15
- Annesley Street (Llanelli) LtdProperty developers
- A&J Landscapes and Property Maintenance LimitedLandscapers and gardeners
- A.C Electrics Llanelli LtdElectricians
- Blue Lagoon Paving & Patios LtdLandscapers and gardeners
- Gwyn Towns Installations LtdInstallers
- Ozma Developments LtdProperty developers
- Swansea Mobile Boat Engineers LtdMachinery repair and installation
- South Wales Bathrooms and Heating LtdPlumbers and heating engineers
What happens if Celtic Instrumentation 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 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 03092822
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 August 1995 (31 years ago)
- Registered office
- 6 Coalbrook Road, Pontyberem, Llanelli, SA15 5HU
- Nature of business
- Installation of industrial machinery and equipment (SIC 33200)
Agents specialized in the sale of other particular products (SIC 46180)
Engineering related scientific and technical consulting activities (SIC 71122) - Year end
- 30 November (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 15 September 2026
- Previous names
- Celtic Marine & Instrumentation Ltd (until 6 Oct 2008)
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 Llanelli
Other active machinery repair and installation companies registered in Llanelli.
- Crane Aid Service Company Limited2003
- Gower Marine Limited2026
- JK Mobile Caravan Servicing and Repairs Limited2012
- Morris Access Renewables Ltd2024
- Phillip Rees Welding Limited2005
- Power Plus Motor Company Ltd2010
- R-T-S-Cycles Ltd2024
- Responsive Mechanical Services Ltd2024
All machinery repair and installation companies in Llanelli · All trades in Llanelli · Machinery repair and installation across the UK
Frequently asked questions
When are Celtic Instrumentation Ltd's accounts due?
Celtic Instrumentation Ltd's next accounts are due at Companies House by 31 August 2027 (in 322 days), covering the period to 30 November 2026.
When is Celtic Instrumentation Ltd's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is Celtic Instrumentation Ltd still trading?
Celtic Instrumentation 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 Celtic Instrumentation Ltd do?
Celtic Instrumentation Ltd is registered under Installation of industrial machinery and equipment (SIC 33200); Agents specialized in the sale of other particular products (SIC 46180); Engineering related scientific and technical consulting activities (SIC 71122).
How old is Celtic Instrumentation Ltd?
Celtic Instrumentation Ltd was incorporated on 18 August 1995, 31 years ago.
What is the penalty if Celtic Instrumentation 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 Celtic Instrumentation 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.