- Companies
- Machinery repair and installation
- Portsmouth
- Black Gang Marine Ltd
Black Gang Marine Ltd
- Company number
- 11540736
- Incorporated
- 29 Aug 20188 years trading
- Registered office
- Unit 16 the Slipway, Port Solent Marina, Portsmouth, Hampshire, PO6 4TR
- Nature of business
- Repair and maintenance of ships and boats
Black Gang Marine Ltd is a 8-year-old private limited company registered in Portsmouth, company number 11540736, one of 55 machinery repair and installation companies in Portsmouth. Its next accounts are due at Companies House on 30 June 2027, and the CT600 for the period to 30 September 2026 is due at HMRC on 30 September 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 £43K (+100.1%) on the year before, to £85K.
- Net assets rose in 4 of 6 year-on-year comparisons on record.
- Current assets of £121K against £68K owed within a year: 1.8 times cover.
- 7 employees on average during the year.
- Balance sheets on record for 7 years, 2019 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Sep 2025 | £85K | £54K | £121K | £68K | 7 |
| 30 Sep 2024 | £43K | £33K | £76K | £68K | 7 |
| 30 Sep 2023 | £22K | £18K | £44K | £50K | 6 |
| 30 Sep 2022 | £34K | £48K | £82K | £44K | 8 |
| 30 Sep 2021 | £51K | £40K | £88K | £27K | 6 |
| 30 Sep 2020 | £10K | £35K | £42K | £11K | 2 |
| 30 Sep 2019 | £6,001 | £4,873 | £11K | £11K | 1 |
Where Black Gang Marine Ltd is registered
The registered office is in Portsmouth (PO6), in the Portsmouth local authority area, South East. Show PO6 4TR on a map.
Other trade companies in PO6
- Bellagio Partners LtdBuilders
- Cpenw LtdMachinery repair and installation
- Marla Brickwork & Construction LtdProperty developers
- Miracles in Metal LtdMechanics and garages
- FH Fire & Electrical LtdElectricians
- Thomcore LimitedSpecialist contractors
- JMS Southern LtdElectricians
- The Motum Group LtdSpecialist contractors
What happens if Black Gang Marine 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 30 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jul 2027 to 31 Jul 2027 | £150 |
| 1 to 3 months late | 1 Aug 2027 to 30 Sep 2027 | £375 |
| 3 to 6 months late | 1 Oct 2027 to 31 Dec 2027 | £750 |
| More than 6 months late | From 1 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 11540736
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 August 2018 (8 years ago)
- Registered office
- Unit 16 the Slipway, Port Solent Marina, Portsmouth, Hampshire, PO6 4TR
- Nature of business
- Repair and maintenance of ships and boats (SIC 33150)
- Year end
- 30 September (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 28 August 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 Portsmouth
Other active machinery repair and installation companies registered in Portsmouth.
- Bowepark Limited2001
- Bravo November Limited2023
- Carrad Engineering Ltd2022
- Celetric Limited2025
- Cowes Boatyard Limited2022
- Cpenw Ltd2026
- Dallinson Ltd2022
- Davidlholmes Contracting Ltd2014
All machinery repair and installation companies in Portsmouth · All trades in Portsmouth · Machinery repair and installation across the UK
Frequently asked questions
When are Black Gang Marine Ltd's accounts due?
Black Gang Marine Ltd's next accounts are due at Companies House by 30 June 2027 (in 260 days), covering the period to 30 September 2026.
When is Black Gang Marine Ltd's CT600 due?
The CT600 for the period to 30 September 2026 is due at HMRC by 30 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2027.
Is Black Gang Marine Ltd still trading?
Black Gang Marine 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 Black Gang Marine Ltd do?
Black Gang Marine Ltd is registered under Repair and maintenance of ships and boats (SIC 33150).
How old is Black Gang Marine Ltd?
Black Gang Marine Ltd was incorporated on 29 August 2018, 8 years ago.
What is the penalty if Black Gang Marine 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 Black Gang Marine 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.