- Companies
- Machinery repair and installation
- London
- Seafleetbackbone Ltd
Seafleetbackbone Ltd
- Company number
- 16537948
- Incorporated
- 24 Jun 20251 year trading
- Registered office
- 4TH Floor Citygate House, 246-250 Romford Road, London, E7 9HZ
- Nature of business
- Repair and maintenance of ships and boats; Agents involved in the sale of machinery, industrial equipment, ships and aircraft; Management of real estate on a fee or contract basis; Renting and leasing of freight water transport equipment
Seafleetbackbone Ltd is a 1-year-old private limited company registered in London, company number 16537948, one of 1,743 machinery repair and installation companies in London. Its next accounts are due at Companies House on 24 March 2027, and its first CT600 is due at HMRC on 23 June 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.
Is this your company?
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Where Seafleetbackbone Ltd is registered
The registered office is in London (E7), in the Newham local authority area, London. Show E7 9HZ on a map.
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- Maintenance Group UK LimitedMachinery repair and installation
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- Love 4 Properties LtdProperty developers
- MMS Private LtdRepair services
- Nexb LtdMotor traders
- Ad Tyres & Automotive LtdMotor traders
What happens if Seafleetbackbone 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 24 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 25 Mar 2027 to 24 Apr 2027 | £150 |
| 1 to 3 months late | 25 Apr 2027 to 24 Jun 2027 | £375 |
| 3 to 6 months late | 25 Jun 2027 to 24 Sep 2027 | £750 |
| More than 6 months late | From 25 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 16537948
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 24 June 2025 (1 year ago)
- Registered office
- 4TH Floor Citygate House, 246-250 Romford Road, London, E7 9HZ
- Nature of business
- Repair and maintenance of ships and boats (SIC 33150)
Agents involved in the sale of machinery, industrial equipment, ships and aircraft (SIC 46140)
Management of real estate on a fee or contract basis (SIC 68320)
Renting and leasing of freight water transport equipment (SIC 77342) - Year end
- 30 June (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 3 June 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 London
Other active machinery repair and installation companies registered in London.
- Seamless Repairs Ltd2023
- Sean Kelly Lubrications Limited2008
- Seatbelt Services Limited2008
- Seavia Ltd2022
- Secure Flame Protection Ltd2026
- Security Systems 247 Limited2010
- Sefa Electrical Services Ltd2025
- Selectronics Phone and Computer Repairs Limited2020
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Frequently asked questions
When are Seafleetbackbone Ltd's accounts due?
Seafleetbackbone Ltd's next accounts are due at Companies House by 24 March 2027 (in 163 days), covering the period to 30 June 2026.
When is Seafleetbackbone Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 23 June 2026, due by 23 June 2027, and one for the period to 30 June 2026, due by 30 June 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Seafleetbackbone Ltd still trading?
Seafleetbackbone 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 Seafleetbackbone Ltd do?
Seafleetbackbone Ltd is registered under Repair and maintenance of ships and boats (SIC 33150); Agents involved in the sale of machinery, industrial equipment, ships and aircraft (SIC 46140); Management of real estate on a fee or contract basis (SIC 68320); Renting and leasing of freight water transport equipment (SIC 77342).
How old is Seafleetbackbone Ltd?
Seafleetbackbone Ltd was incorporated on 24 June 2025, 1 year ago.
What is the penalty if Seafleetbackbone 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 Seafleetbackbone 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.