- Companies
- Electricians
- High Wycombe
- Seaward Security Ltd
Seaward Security Ltd
- Company number
- 04870725
- Incorporated
- 19 Aug 200323 years trading
- Registered office
- 1 Harebell Walk, Widmer End, High Wycombe, HP15 6BT
- Nature of business
- Electrical installation
Seaward Security Ltd is a 23-year-old private limited company registered in High Wycombe, company number 04870725, one of 123 electrical contractors in High Wycombe. Its next accounts are due at Companies House on 30 May 2027, and the CT600 for the period to 30 August 2026 is due at HMRC on 30 August 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2025
From the balance sheet at 31 August 2025, as filed at Companies House.
Seaward Security Ltd over the years
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 £3,081 (-45%) on the year before, to £3,763.
- Net assets rose in 3 of 9 year-on-year comparisons on record.
- Current assets of £22K against £22K owed within a year: 1.0 times cover.
- 2 employees on average during the year.
- 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 Aug 2025 | £3,763 | £16K | £22K | £22K | 2 |
| 31 Aug 2024 | £6,844 | £24K | £26K | £24K | 2 |
| 31 Aug 2023 | £8,400 | £29K | £16K | 2 | |
| 31 Aug 2022 | £4,061 | £33K | £19K | 2 | |
| 31 Aug 2021 | £3,477 | £39K | £22K | 2 | |
| 31 Aug 2020 | £6,765 | £33K | £9,498 | 2 | |
| 31 Aug 2019 | -£11K | -£21K | £20K | ||
| 31 Aug 2018 | -£7,819 | -£25K | £30K | ||
| 31 Aug 2017 | -£525 | -£20K | £20K | ||
| 31 Aug 2016 | £24K | £56K | £31K |
Where Seaward Security Ltd is registered
The registered office is in High Wycombe (HP15), in the Buckinghamshire local authority area, South East. Show HP15 6BT on a map.
Other trade companies in HP15
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- Jac Electrical Labour LtdElectricians
- Adf Property Management LimitedFinishing trades
- Bramwell & Dare LtdProperty developers
- KJ Electrical LtdElectricians
- Sircle Consultants LtdInstallers
- Firstscapes LtdLandscapers and gardeners
- Swarthmore Land LtdBuilders
What happens if Seaward Security 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 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 31 May 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 30 Aug 2027 | £375 |
| 3 to 6 months late | 31 Aug 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 31 Aug 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Aug 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
- 04870725
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 August 2003 (23 years ago)
- Registered office
- 1 Harebell Walk, Widmer End, High Wycombe, HP15 6BT
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 30 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 18 August 2026
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies in High Wycombe
Other active electrical contractors registered in High Wycombe.
- Selleck Properties Limited1977
- Short Circuit Electrical Contractors Ltd2024
- Smart Breeze Limited2026
- Solasave Limited2010
- Springbok Electrical Ltd2017
- Sprint Security Ltd2006
- Surelectric Limited2006
- Thames Electrical Services Ltd2016
All electrical contractors in High Wycombe · All trades in High Wycombe · Electricians across the UK
Frequently asked questions
When are Seaward Security Ltd's accounts due?
Seaward Security Ltd's next accounts are due at Companies House by 30 May 2027 (in 230 days), covering the period to 30 August 2026.
When is Seaward Security Ltd's CT600 due?
The CT600 for the period to 30 August 2026 is due at HMRC by 30 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 31 May 2027.
Is Seaward Security Ltd still trading?
Seaward Security 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 Seaward Security Ltd do?
Seaward Security Ltd is registered under Electrical installation (SIC 43210).
How old is Seaward Security Ltd?
Seaward Security Ltd was incorporated on 19 August 2003, 23 years ago.
What is the penalty if Seaward Security 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 Seaward Security 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.