- Companies
- Machinery repair and installation
- Tring
- Southeast Mobile Marine Services Ltd
Southeast Mobile Marine Services Ltd
- Company number
- 16307220
- Incorporated
- 11 Mar 20251 year trading
- Registered office
- 16 Rosebery Way, Tring, HP23 5DS
- Nature of business
- Repair of fabricated metal products
Southeast Mobile Marine Services Ltd is a 1-year-old private limited company registered in Tring, company number 16307220, one of 12 machinery repair and installation companies in Tring. Its next accounts are due at Companies House on 11 December 2026, and its first CT600 is due at HMRC on 10 March 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 Southeast Mobile Marine Services Ltd is registered
The registered office is in Tring (HP23), in the Dacorum local authority area, East of England. Show HP23 5DS on a map.
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What happens if Southeast Mobile Marine Services 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 11 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 12 Dec 2026 to 11 Jan 2027 | £150 |
| 1 to 3 months late | 12 Jan 2027 to 11 Mar 2027 | £375 |
| 3 to 6 months late | 12 Mar 2027 to 11 Jun 2027 | £750 |
| More than 6 months late | From 12 Jun 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
- 16307220
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 11 March 2025 (1 year ago)
- Registered office
- 16 Rosebery Way, Tring, HP23 5DS
- Nature of business
- Repair of fabricated metal products (SIC 33110)
- Year end
- 31 March (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 10 March 2026
- Previous names
- DW Marine Services Ltd (until 25 Mar 2025)
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 Tring
Other active machinery repair and installation companies registered in Tring.
- The Guitar Engineer Limited2022
- Alm Sheet Metal and Fabrication Ltd2022
- Bates Boatyard Limited2012
- Chiltern Engineering Solutions Limited2012
- Design & Build Mavericks Ltd2014
- Ech Asset Solutions Ltd2021
- Gent Fire & Security Ltd2013
- Ijb Ltd2018
All machinery repair and installation companies in Tring · All trades in Tring · Machinery repair and installation across the UK
Frequently asked questions
When are Southeast Mobile Marine Services Ltd's accounts due?
Southeast Mobile Marine Services Ltd's next accounts are due at Companies House by 11 December 2026 (in 58 days), covering the period to 31 March 2026.
When is Southeast Mobile Marine Services 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 10 March 2026, due by 10 March 2027, and one for the period to 31 March 2026, due by 31 March 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Southeast Mobile Marine Services Ltd still trading?
Southeast Mobile Marine Services 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 Southeast Mobile Marine Services Ltd do?
Southeast Mobile Marine Services Ltd is registered under Repair of fabricated metal products (SIC 33110).
How old is Southeast Mobile Marine Services Ltd?
Southeast Mobile Marine Services Ltd was incorporated on 11 March 2025, 1 year ago.
What is the penalty if Southeast Mobile Marine Services 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 Southeast Mobile Marine Services 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.