- Companies
- Plumbers and heating engineers
- Kingston upon Thames
- Copper and Flux Ltd
Copper and Flux Ltd
- Company number
- 16123216
- Incorporated
- 9 Dec 20241 year trading
- Registered office
- Mariners Retreat, Lower Teddington Road, Kingston upon Thames, KT1 4ER
- Nature of business
- Plumbing, heat and air-conditioning installation
Copper and Flux Ltd is a 1-year-old private limited company registered in Kingston upon Thames, company number 16123216, one of 21 plumbing and heating companies in Kingston upon Thames. Its next accounts are due at Companies House on 5 January 2028, and the CT600 for the period to 5 April 2027 is due at HMRC on 5 April 2028.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2026
From the balance sheet at 5 April 2026, as filed at Companies House. Negative net assets mean the company owed more than it owned at that date.
Where Copper and Flux Ltd is registered
The registered office is in Kingston upon Thames (KT1), in the Richmond upon Thames local authority area, London. Show KT1 4ER on a map.
Other trade companies in KT1
- Bespoke Garden Homes LimitedBuilders
- Kingston Roofing and Restoration LtdBuilders
- Apline UK LtdMotor traders
- Grip KTS LtdMechanics and garages
- Alvo Construction LtdBuilders
- Baw Auto UK LimitedMotor traders
- Black Dog RPM LimitedCleaning companies
- Idecor8 Group LtdBuilders
What happens if Copper and Flux 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 5 January 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 6 Jan 2028 to 5 Feb 2028 | £150 |
| 1 to 3 months late | 6 Feb 2028 to 5 Apr 2028 | £375 |
| 3 to 6 months late | 6 Apr 2028 to 5 Jul 2028 | £750 |
| More than 6 months late | From 6 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 6 Apr 2028 | £200 |
| 3 months late | 5 Jul 2028 | another £200 |
| 6 months late | 5 Oct 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 5 Apr 2029 | 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
- 16123216
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 December 2024 (1 year ago)
- Registered office
- Mariners Retreat, Lower Teddington Road, Kingston upon Thames, KT1 4ER
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 5 April (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 5 April 2026
- Last confirmation statement
- 8 December 2025
- Charges (mortgages)
- 1 outstanding of 1 registered
- Previous names
- HVAC Solutions London Ltd (until 4 Sep 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 Kingston upon Thames
Other active plumbing and heating companies registered in Kingston upon Thames.
- Crystal View Homes Limited2024
- DTR Construction Services Limited2025
- Elsby & Co Heating Limited2022
- Fair Property Services Ltd2024
- Greencurrent Heating Ltd2026
- Heating & Plumbing UK Limited2004
- JF Plumbing & Heating Specialists Ltd2024
- Max Fix Plumbing Ltd2026
All plumbing and heating companies in Kingston upon Thames · All trades in Kingston upon Thames · Plumbers and heating engineers across the UK
Frequently asked questions
When are Copper and Flux Ltd's accounts due?
Copper and Flux Ltd's next accounts are due at Companies House by 5 January 2028 (in 449 days), covering the period to 5 April 2027.
When is Copper and Flux Ltd's CT600 due?
The CT600 for the period to 5 April 2027 is due at HMRC by 5 April 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 6 January 2028.
Is Copper and Flux Ltd still trading?
Copper and Flux 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 Copper and Flux Ltd do?
Copper and Flux Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Copper and Flux Ltd?
Copper and Flux Ltd was incorporated on 9 December 2024, 1 year ago.
What is the penalty if Copper and Flux 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 Copper and Flux 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.