- Companies
- Electricians
- London
- The Alarm Guys Ltd
The Alarm Guys Ltd
- Company number
- 11943405
- Incorporated
- 12 Apr 20197 years trading
- Registered office
- 71-75 Shelton Street, London, WC2H 9JQ
- Nature of business
- Electrical installation
The Alarm Guys Ltd is a 7-year-old private limited company registered in London, company number 11943405, one of 3,448 electrical contractors in London. Companies House shows its accounts as overdue: they were due on 31 January 2023.
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 £699 (-78.8%) on the year before, to £188.
- Current assets of £66K against £18K owed within a year: 3.7 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 2 years, 2020 to 2021.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Apr 2021 | £188 | £48K | £66K | £18K | 0 |
| 30 Apr 2020 | £887 | £20 | £10K | £10K | 1 |
Where The Alarm Guys Ltd is registered
The registered office is in London (WC2H), in the Camden local authority area, London. Show WC2H 9JQ on a map.
Other trade companies in WC2H
- Superclean Agency LtdCleaning companies
- Sal Cleaning LtdCleaning companies
- Cityshine Facilities Services LtdCleaning companies
- Pureoceanscleaning LtdCleaning companies
- Muca Property Group LimitedProperty developers
- E.L.G.G LtdJoiners and carpenters
- First Ascentia Integrated LtdCleaning companies
- Fixing London LtdSpecialist contractors
Shared registered office
4,529 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if The Alarm Guys Ltd files late
If the accounts reach Companies House today, the late filing penalty is £1,500 (£3,000 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Feb 2023 to 28 Feb 2023 | £150 |
| 1 to 3 months late | 1 Mar 2023 to 30 Apr 2023 | £375 |
| 3 to 6 months late | 1 May 2023 to 31 Jul 2023 | £750 |
| More than 6 months late | From 1 Aug 2023 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 May 2023 | £200 |
| 3 months late | 30 Jul 2023 | another £200 |
| 6 months late | 30 Oct 2023 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Apr 2024 | 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
- 11943405
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 12 April 2019 (7 years ago)
- Registered office
- 71-75 Shelton Street, London, WC2H 9JQ
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 30 April (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 April 2021
- Last confirmation statement
- 6 April 2024
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.
- The Cycling Sparks Ltd.2017
- The Electrical Collective Ltd2026
- The Good Sparky Electrical Services Ltd2026
- The Home of Construction Limited2022
- The London Maintenance Group Limited2024
- The Ohm Guru Limited2025
- The One Electrician Ltd2021
- The Point Services Group Ltd2025
All electrical contractors in London · All trades in London · Electricians across the UK
Frequently asked questions
When are The Alarm Guys Ltd's accounts due?
The Alarm Guys Ltd's accounts were due at Companies House on 31 January 2023 and the register shows them as overdue.
When is The Alarm Guys Ltd's CT600 due?
The CT600 for the period to 30 April 2022 is due at HMRC by 30 April 2023, 12 months after the period end. The corporation tax itself is payable earlier, by 1 February 2023.
Is The Alarm Guys Ltd still trading?
The Alarm Guys Ltd is listed as active on the Companies House register (checked 14 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 The Alarm Guys Ltd do?
The Alarm Guys Ltd is registered under Electrical installation (SIC 43210).
How old is The Alarm Guys Ltd?
The Alarm Guys Ltd was incorporated on 12 April 2019, 7 years ago.
What is the penalty if The Alarm Guys 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 The Alarm Guys Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 14 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.