- Companies
- Machinery repair and installation
- Poole
- Diamond Security Systems Limited
Diamond Security Systems Limited
- Company number
- 07476474
- Incorporated
- 22 Dec 201015 years trading
- Registered office
- Unit E1 Wareham Road, Holton Heath, Poole, BH16 6JL
- Nature of business
- Repair of electrical equipment; Security systems service activities
Diamond Security Systems Limited is a 15-year-old private limited company registered in Poole, company number 07476474, one of 117 machinery repair and installation companies in Poole. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 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 £939 (-11.1%) on the year before, to £7,500.
- Current assets of £8,207 against £707 owed within a year: more than 10 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 4 years, 2014 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £7,500 | £8,207 | £707 | 2 | |
| 31 Dec 2024 | £8,439 | £9,081 | £642 | 2 | |
| 31 Dec 2015 | £2 | ||||
| 31 Dec 2014 | £2 |
Where Diamond Security Systems Limited is registered
The registered office is in Poole (BH16), in the Dorset local authority area, South West. Show BH16 6JL on a map.
Other trade companies in BH16
- Kerthow LimitedProperty developers
- Together Rewards LtdMotor traders
- Evans Home Servicing LtdJoiners and carpenters
- Core Electrical LtdElectricians
- Morrish Developments LimitedProperty developers
- Puraheat LtdPlumbers and heating engineers
- Quintopus LtdProperty developers
- Sika Property Services LtdSpecialist contractors
What happens if Diamond Security Systems 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 30 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 07476474
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 December 2010 (15 years ago)
- Registered office
- Unit E1 Wareham Road, Holton Heath, Poole, BH16 6JL
- Nature of business
- Repair of electrical equipment (SIC 33140)
Security systems service activities (SIC 80200) - Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 22 December 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 Poole
Other active machinery repair and installation companies registered in Poole.
- DKRJ Elec Ltd2025
- Dolphin Dental Equipment Services Ltd2012
- Electranet Solutions Ltd2011
- Es Marine Limited2013
- Excess IT Solutions Limited2014
- Falcon Repairs Limited2005
- Finesse Marine Ltd2018
- Flovi Limited2022
All machinery repair and installation companies in Poole · All trades in Poole · Machinery repair and installation across the UK
Frequently asked questions
When are Diamond Security Systems Limited's accounts due?
Diamond Security Systems Limited's next accounts are due at Companies House by 30 September 2027 (in 353 days), covering the period to 31 December 2026.
When is Diamond Security Systems Limited's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is Diamond Security Systems Limited still trading?
Diamond Security Systems 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 Diamond Security Systems Limited do?
Diamond Security Systems Limited is registered under Repair of electrical equipment (SIC 33140); Security systems service activities (SIC 80200).
How old is Diamond Security Systems Limited?
Diamond Security Systems Limited was incorporated on 22 December 2010, 15 years ago.
What is the penalty if Diamond Security Systems 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 Diamond Security Systems 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.