- Companies
- Machinery repair and installation
- London
- Plym Pat Testing Limited
Plym Pat Testing Limited
- Company number
- 16673339
- Incorporated
- 26 Aug 20251 year trading
- Registered office
- 167-169 Great Portland Street, London, W1W 5PF
- Nature of business
- Repair of electrical equipment
Plym Pat Testing Limited is a 1-year-old private limited company registered in London, company number 16673339, one of 1,743 machinery repair and installation companies in London. Its next accounts are due at Companies House on 26 May 2027, and its first CT600 is due at HMRC on 25 August 2027.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where Plym Pat Testing Limited is registered
The registered office is in London (W1W), in the Westminster local authority area, London. Show W1W 5PF on a map.
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Shared registered office
1,494 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Plym Pat Testing 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 26 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 27 May 2027 to 26 Jun 2027 | £150 |
| 1 to 3 months late | 27 Jun 2027 to 26 Aug 2027 | £375 |
| 3 to 6 months late | 27 Aug 2027 to 26 Nov 2027 | £750 |
| More than 6 months late | From 27 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 16673339
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 26 August 2025 (1 year ago)
- Registered office
- 167-169 Great Portland Street, London, W1W 5PF
- Nature of business
- Repair of electrical equipment (SIC 33140)
- Year end
- 31 August (accounting reference date)
- Accounts type
- No accounts filed yet
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 London
Other active machinery repair and installation companies registered in London.
- PM Marine Services Ltd2026
- PMG Controls & Electrical Services Ltd2024
- PMG Yachting Ltd2022
- PN Aviation Services Ltd2025
- Poggi UK Ltd2023
- Pohlmeca Ltd2023
- Poltech Service Ltd2025
- Pooltec Services Limited2005
All machinery repair and installation companies in London · All trades in London · Machinery repair and installation across the UK
Frequently asked questions
When are Plym Pat Testing Limited's accounts due?
Plym Pat Testing Limited's next accounts are due at Companies House by 26 May 2027 (in 225 days), covering the period to 31 August 2026.
When is Plym Pat Testing 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 25 August 2026, due by 25 August 2027, and one for the period to 31 August 2026, due by 31 August 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Plym Pat Testing Limited still trading?
Plym Pat Testing Limited is listed as active on the Companies House register (checked 12 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 Plym Pat Testing Limited do?
Plym Pat Testing Limited is registered under Repair of electrical equipment (SIC 33140).
How old is Plym Pat Testing Limited?
Plym Pat Testing Limited was incorporated on 26 August 2025, 1 year ago.
What is the penalty if Plym Pat Testing 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 Plym Pat Testing Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.