- Companies
- Specialist contractors
- Subsea Engineering Services Limited
Subsea Engineering Services Limited
- Company number
- 08088664
- Incorporated
- 30 May 201214 years trading
- Registered office
- Tir Na Nog, ., Bodorgan, Gwynedd, LL62 5BN
- Nature of business
- Other specialised construction activities n.e.c.; Other accommodation; Other professional, scientific and technical activities n.e.c.
Subsea Engineering Services Limited is a 14-year-old private limited company registered in Bodorgan, company number 08088664, one of the UK's specialist construction companies. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 down £6,887 (-20.7%) on the year before, to £26K.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £112K against £127K owed within a year: 0.9 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 10 years, 2015 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £26K | £112K | £127K | 2 | |
| 31 Mar 2024 | £33K | £92K | £105K | 2 | |
| 31 Mar 2023 | £35K | £70K | £116K | £143K | 0 |
| 31 Oct 2021 | £59K | £76K | £164K | £172K | 3 |
| 31 Oct 2020 | £57K | £86K | £176K | £174K | 2 |
| 31 Oct 2019 | £103K | £50K | £128K | £22K | 2 |
| 31 Oct 2018 | £92K | £24K | £108K | £14K | 1 |
| 31 Oct 2017 | £54K | £82K | £20K | 1 | |
| 31 Oct 2016 | £36K | £59K | £8,358 | ||
| 31 May 2015 | £52K | £28K | £83K | £5,136 |
Where Subsea Engineering Services Limited is registered
The registered office is in Bodorgan (LL62), in the Isle of Anglesey local authority area, Wales. Show LL62 5BN on a map.
Other trade companies in LL62
- The Linen & Laundry Company NW LtdCleaning companies
- Pristine Cleaning Services NW LtdCleaning companies
- Pristine Property Services NW LtdCleaning companies
- W & O Construction LtdInstallers
- Uxo Specialist Ltd.Specialist contractors
- JC Landscape & Garden Services LtdLandscapers and gardeners
- Perkins and Sons LimitedCivil engineering
- Maitland Installations LtdGlaziers
What happens if Subsea Engineering Services 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 31 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 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
- 08088664
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 30 May 2012 (14 years ago)
- Registered office
- Tir Na Nog, ., Bodorgan, Gwynedd, LL62 5BN
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
Other accommodation (SIC 55900)
Other professional, scientific and technical activities n.e.c. (SIC 74909) - Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 29 November 2025
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies
Other active specialist construction companies.
Frequently asked questions
When are Subsea Engineering Services Limited's accounts due?
Subsea Engineering Services Limited's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is Subsea Engineering Services Limited's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Subsea Engineering Services Limited still trading?
Subsea Engineering Services Limited 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 Subsea Engineering Services Limited do?
Subsea Engineering Services Limited is registered under Other specialised construction activities n.e.c. (SIC 43999); Other accommodation (SIC 55900); Other professional, scientific and technical activities n.e.c. (SIC 74909).
How old is Subsea Engineering Services Limited?
Subsea Engineering Services Limited was incorporated on 30 May 2012, 14 years ago.
What is the penalty if Subsea Engineering Services 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 Subsea Engineering Services Limited 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.