- Companies
- Machinery repair and installation
- Swansea
- Sea-Lift Diving Limited
Sea-Lift Diving Limited
- Company number
- 02576702
- Incorporated
- 24 Jan 199135 years trading
- Registered office
- 20 Market Street, Morriston, Swansea, SA6 8DA
- Nature of business
- Repair of machinery
Sea-Lift Diving Limited is a 35-year-old private limited company registered in Swansea, company number 02576702, one of 98 machinery repair and installation companies in Swansea. 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.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Sea-Lift Diving LimitedOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 £214K (-43.4%) on the year before, to £280K.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £294K against £147K owed within a year: 2.0 times cover.
- 10 employees on average, up from 9 the year before.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £280K | £16 | £294K | £147K | 10 |
| 31 Mar 2024 | £494K | £244K | £555K | £169K | 9 |
| 31 Mar 2023 | £375K | £244K | £607K | £275K | 3 |
| 31 Mar 2022 | £358K | £259K | £362K | £86K | 4 |
| 31 Mar 2021 | £255K | £99K | £214K | £59K | 4 |
| 31 Mar 2020 | £254K | £90K | £246K | £91K | 4 |
| 31 Mar 2019 | £250K | £192K | £215K | £47K | 4 |
| 31 Mar 2018 | £169K | £102K | £179K | £104K | 4 |
| 31 Mar 2017 | £83K | £23K | £182K | £184K | 14 |
| 31 Mar 2016 | £63K | £6,808 | £55K | £85K |
Where Sea-Lift Diving Limited is registered
The registered office is in Swansea (SA6), in the Swansea local authority area, Wales. Show SA6 8DA on a map.
Other trade companies in SA6
- Alpine Roofing (Swansea) LimitedRoofers
- Auto Surplus Wales LtdMotor traders
- Roofmaster Roofing and Building LtdProperty developers
- Everyday Maintenance Services LtdSpecialist contractors
- M.E Exterior Cleaning LimitedCleaning companies
- Color Harmony LtdPainters and decorators
- RSM Cars LimitedMotor traders
- T&T Roofing & Home Improvements LtdRoofers
What happens if Sea-Lift Diving 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
- 02576702
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 24 January 1991 (35 years ago)
- Registered office
- 20 Market Street, Morriston, Swansea, SA6 8DA
- Nature of business
- Repair of machinery (SIC 33120)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 31 October 2025
- Charges (mortgages)
- 0 outstanding of 1 registered
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 Swansea
Other active machinery repair and installation companies registered in Swansea.
- SG Locksmiths Limited2016
- South Coast Property Maintenance Ltd2024
- South Wales Woodwind Ltd.2010
- Static Caravan Repairs Ltd2019
- Swalek Ltd2013
- Swansea Refrigeration Ltd2016
- Swansea Turbine Services Limited2025
- SWLR Ltd2004
All machinery repair and installation companies in Swansea · All trades in Swansea · Machinery repair and installation across the UK
Frequently asked questions
When are Sea-Lift Diving Limited's accounts due?
Sea-Lift Diving Limited's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Sea-Lift Diving 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 Sea-Lift Diving Limited still trading?
Sea-Lift Diving 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 Sea-Lift Diving Limited do?
Sea-Lift Diving Limited is registered under Repair of machinery (SIC 33120).
How old is Sea-Lift Diving Limited?
Sea-Lift Diving Limited was incorporated on 24 January 1991, 35 years ago.
What is the penalty if Sea-Lift Diving 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 Sea-Lift Diving 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.