- Companies
- Electricians
- Harrow
- Ardent Security Limited
Ardent Security Limited
- Company number
- 02645626
- Incorporated
- 13 Sep 199135 years trading
- Registered office
- Suite 6, Floor 2 Congress House, 14 Lyon Road, Harrow, HA1 2EN
- Nature of business
- Electrical installation
Ardent Security Limited is a 35-year-old private limited company registered in Harrow, company number 02645626, one of 200 electrical contractors in Harrow. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 30 May 2026 is due at HMRC on 30 May 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 up £213K (+99.9%) on the year before, to £426K.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £497K against £307K owed within a year: 1.6 times cover.
- 8 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 |
|---|---|---|---|---|---|
| 30 May 2025 | £426K | £314K | £497K | £307K | 8 |
| 30 May 2024 | £213K | £198K | £280K | £284K | 8 |
| 31 May 2023 | £182K | £199K | £276K | £270K | 8 |
| 31 May 2022 | £169K | £124K | £199K | £164K | 8 |
| 31 May 2021 | £280K | £372K | £448K | £254K | 8 |
| 31 May 2020 | £462K | £373K | £480K | £225K | 9 |
| 31 May 2019 | £400K | £84K | £319K | £117K | 9 |
| 31 May 2018 | £352K | £270K | £339K | £170K | 8 |
| 31 May 2017 | £345K | £331K | £421K | £233K | 8 |
| 31 May 2016 | £192K | £158K | £223K | £182K |
Where Ardent Security Limited is registered
The registered office is in Harrow (HA1), in the Harrow local authority area, London. Show HA1 2EN on a map.
Other trade companies in HA1
- Cabos Electrical LimitedElectricians
- Mia Maria Services LtdCleaning companies
- Ac Operations LtdScaffolders
- Verde Masters LtdLandscapers and gardeners
- Omega Works Group LtdLandscapers and gardeners
- Call 'Em LimitedPlumbers and heating engineers
- Swan Roofing Services LimitedRoofers
- DRV Property Solutions LtdPainters and decorators
Also registered at this address
21 other companies use the same registered office as Ardent Security Limited.
- A Brockwitz Builders LtdSpecialist contractors
- A Level Property LtdBuilders
- Bridport Interiors LimitedSpecialist contractors
- Bridport Joinery Contracts LimitedSpecialist contractors
- Bridport Properties LimitedSpecialist contractors
- Cairnpark Properties (the Vale) LimitedProperty developers
- Chameleon Systems Ltd.Specialist contractors
- Chess Architecture & Development LimitedProperty developers
- Chess Homes LimitedProperty developers
- KPD Realty Construction LtdBuilders
- Kyn Services LtdBuilders
- Lifestyle Building and Developments LimitedProperty developers
- Millen Homes LimitedProperty developers
- Millen Land Group LtdProperty developers
- Murphys Contractors LimitedLandscapers and gardeners
- Pro Plumbing Heating & Boilers LtdPlumbers and heating engineers
- Projekt 964 LimitedMotor traders
- Rayleigh Close LtdProperty developers
- Roachy’S Rigs LtdSpecialist contractors
- Stehlin UK LimitedProperty developers
- Windmill Cottages Close LimitedProperty developers
What happens if Ardent Security 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 31 May 2027 | £200 |
| 3 months late | 30 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 May 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
- 02645626
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 13 September 1991 (35 years ago)
- Registered office
- Suite 6, Floor 2 Congress House, 14 Lyon Road, Harrow, HA1 2EN
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 30 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 May 2025
- Last confirmation statement
- 5 August 2026
- Charges (mortgages)
- 2 outstanding of 2 registered
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 Harrow
Other active electrical contractors registered in Harrow.
- Aum Electrical & Solar Solutions Ltd2017
- Avs Projects Limited2019
- Bali Heating & Plumbing Ltd2015
- Barons Electrical Ltd2025
- BCW Lighting Limited2011
- BD Lighting Limited2012
- Biotech Mechanical Limited2023
- Blue Electrical Services Limited2007
All electrical contractors in Harrow · All trades in Harrow · Electricians across the UK
Frequently asked questions
When are Ardent Security Limited's accounts due?
Ardent Security Limited's next accounts are due at Companies House by 28 February 2027 (in 139 days), covering the period to 30 May 2026.
When is Ardent Security Limited's CT600 due?
The CT600 for the period to 30 May 2026 is due at HMRC by 30 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is Ardent Security Limited still trading?
Ardent Security 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 Ardent Security Limited do?
Ardent Security Limited is registered under Electrical installation (SIC 43210).
How old is Ardent Security Limited?
Ardent Security Limited was incorporated on 13 September 1991, 35 years ago.
What is the penalty if Ardent Security 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 Ardent Security 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.