- Companies
- Electricians
- London
- MT Security Systems Ltd
MT Security Systems Ltd
- Company number
- 07300426
- Incorporated
- 30 Jun 201016 years trading
- Registered office
- Wellesley House Duke of Wellington Avenue, Royal Arsenal, London, SE18 6SS
- Nature of business
- Electrical installation
MT Security Systems Ltd is a 16-year-old private limited company registered in London, company number 07300426, one of 3,448 electrical contractors in London. 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 up £9 (+6.5%) on the year before, to £148.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £149K against £154K owed within a year: 1.0 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- 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 Dec 2025 | £148 | £149K | £154K | 0 | |
| 31 Dec 2024 | £139 | £103K | £106K | 1 | |
| 31 Dec 2023 | £108 | £63K | £59K | 1 | |
| 31 Dec 2022 | £582 | £73K | £61K | 3 | |
| 31 Dec 2021 | £3,409 | £79K | £58K | 3 | |
| 31 Dec 2020 | £914 | £65K | £36K | 2 | |
| 31 Dec 2019 | £5,057 | £68K | £65K | 2 | |
| 31 Dec 2018 | £14K | £71K | £58K | ||
| 31 Dec 2017 | £656 | £18K | £19K | ||
| 31 Dec 2016 | £980 | £16K | £16K |
Where MT Security Systems Ltd is registered
The registered office is in London (SE18), in the Greenwich local authority area, London. Show SE18 6SS on a map.
Other trade companies in SE18
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- Hma Building Services LimitedFinishing trades
- JWJ Road Services LtdCleaning companies
- MK Construction Work LtdBuilders
- Armandopro LimitedBuilders
- Flynn Afghanistan Construction LtdBuilders
- Cleo Clean LtdCleaning companies
- Lutah Electrical LtdElectricians
Also registered at this address
21 other companies use the same registered office as MT Security Systems Ltd.
- A W Electrical LimitedElectricians
- Bismark LimitedGlaziers
- Claremont Motor Engineers (Dartford) LimitedMechanics and garages
- D Brodie Carpentry LimitedFinishing trades
- D T C Services (London) LtdFinishing trades
- Dean Transport Testing LtdMechanics and garages
- E. Elvins & Co. LimitedSpecialist contractors
- Fawkham Electrical Services LtdElectricians
- Hansett Electronics LimitedElectricians
- Hever Properties LtdProperty developers
- Hurlingham Heating LtdPlumbers and heating engineers
- J.R.E. Dinnage LimitedPlumbers and heating engineers
- L & H Property Services LimitedFinishing trades
- Morgan Richards Garage LimitedMechanics and garages
- NS Electrical Services LtdElectricians
- Russell Glazing LtdGlaziers
- S & B Carpentry LimitedJoiners and carpenters
- S S Carpentry and Joinery LimitedBuilders
- Speed & Street LtdFinishing trades
- The Door & Window Centre LtdSpecialist contractors
- Tynelodge LimitedSpecialist contractors
What happens if MT Security Systems 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 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
- 07300426
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 30 June 2010 (16 years ago)
- Registered office
- Wellesley House Duke of Wellington Avenue, Royal Arsenal, London, SE18 6SS
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 29 June 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 London
Other active electrical contractors registered in London.
- MT Sites Limited2010
- MTGL Limited2023
- MTJ Electrical Limited2012
- MTM Electricians Limited2017
- Mtrex Limited2025
- MTS Gas & Electrics Limited2019
- Mudton Ltd2014
- Mul Electrical Limited2012
All electrical contractors in London · All trades in London · Electricians across the UK
Frequently asked questions
When are MT Security Systems Ltd's accounts due?
MT Security Systems Ltd's next accounts are due at Companies House by 30 September 2027 (in 353 days), covering the period to 31 December 2026.
When is MT Security Systems Ltd'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 MT Security Systems Ltd still trading?
MT Security Systems 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 MT Security Systems Ltd do?
MT Security Systems Ltd is registered under Electrical installation (SIC 43210).
How old is MT Security Systems Ltd?
MT Security Systems Ltd was incorporated on 30 June 2010, 16 years ago.
What is the penalty if MT Security Systems 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 MT Security Systems 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.