CTLN Ltd
- Company number
- 12964982
- Incorporated
- 21 Oct 20205 years trading
- Registered office
- 33 Falmouth Grove, Swindon, SN3 1EL
- Nature of business
- Plumbing, heat and air-conditioning installation; Combined office administrative service activities
CTLN Ltd is a 5-year-old private limited company registered in Swindon, company number 12964982, one of 164 plumbing and heating companies in Swindon. 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 £12K (+73%) on the year before, to £27K.
- Net assets rose in 2 of 3 year-on-year comparisons on record.
- Current assets of £48K against £25K owed within a year: 1.9 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 4 years, 2022 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £27K | £30K | £48K | £25K | 2 |
| 31 Mar 2024 | £16K | £9,680 | £31K | £16K | 2 |
| 31 Mar 2023 | £22K | £12K | £39K | £18K | 2 |
| 31 Mar 2022 | £8,075 | £10K | £16K | £7,971 | 2 |
Where CTLN Ltd is registered
The registered office is in Swindon (SN3), in the Swindon local authority area, South West. Show SN3 1EL on a map.
Other trade companies in SN3
- Spark-Clean Business Solutions LtdCleaning companies
- Stars Commercial and Cesidential Cleaning Services LtdCleaning companies
- Sam Simply Sorts LtdCleaning companies
- Westbridge Automotive LtdMotor traders
- H H Autos LimitedMotor traders
- DTH Construction LtdBuilders
- Saf Motor Group LtdMotor traders
- Noel Joy LtdMachinery repair and installation
What happens if CTLN 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 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
- 12964982
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 21 October 2020 (5 years ago)
- Registered office
- 33 Falmouth Grove, Swindon, SN3 1EL
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
Combined office administrative service activities (SIC 82110) - Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 20 October 2025
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in Swindon
Other active plumbing and heating companies registered in Swindon.
- Custom Basins Limited2022
- D L Heating and Cooling Ltd2026
- D&R Heating Services Ltd2018
- Dec Kaye Heating and Plumbing Ltd2026
- Delta Boiler Services Ltd2021
- Demydea Fittings Ltd2026
- Dias Plumbing & Heating Ltd.2026
- DPM Heating and Plumbing Limited2013
All plumbing and heating companies in Swindon · All trades in Swindon · Plumbers and heating engineers across the UK
Frequently asked questions
When are CTLN Ltd's accounts due?
CTLN Ltd's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is CTLN Ltd'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 CTLN Ltd still trading?
CTLN 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 CTLN Ltd do?
CTLN Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220); Combined office administrative service activities (SIC 82110).
How old is CTLN Ltd?
CTLN Ltd was incorporated on 21 October 2020, 5 years ago.
What is the penalty if CTLN 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 CTLN 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.