- Companies
- Electricians
- Swanley
- Sentry Protection Ltd
Sentry Protection Ltd
- Company number
- 15702990
- Incorporated
- 3 May 20242 years trading
- Registered office
- Greenbox Storage College Road, Hextable, Swanley, Kent, BR8 7LT
- Nature of business
- Electrical installation; Security systems service activities; Fire service activities
Sentry Protection Ltd is a 2-year-old private limited company registered in Swanley, company number 15702990, one of 50 electrical contractors in Swanley. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 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 May 2025, as filed at Companies House.
Where Sentry Protection Ltd is registered
The registered office is in Swanley (BR8), in the Sevenoaks local authority area, South East. Show BR8 7LT on a map.
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- Omnidrive Motors LtdMotor traders
- Epx Resins LtdFloor and wall tilers
- SLC Contractors Ltd LtdBuilders
- Build and Beyond CX Consulting LimitedFinishing trades
- Roostanproperty LtdProperty developers
- HL Contract Cleaning Services LtdMechanics and garages
- Fasteasycar LtdMotor traders
Also registered at this address
1 other company uses the same registered office as Sentry Protection Ltd.
- Beskar Support Services LimitedElectricians
What happens if Sentry Protection 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 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 | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 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
- 15702990
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 3 May 2024 (2 years ago)
- Registered office
- Greenbox Storage College Road, Hextable, Swanley, Kent, BR8 7LT
- Nature of business
- Electrical installation (SIC 43210)
Security systems service activities (SIC 80200)
Fire service activities (SIC 84250) - Year end
- 31 May (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 2 May 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 Swanley
Other active electrical contractors registered in Swanley.
- SFN Electrical Services Ltd2019
- Spectrum Electrical Projects Ltd2019
- Swan Electrical Systems Limited2011
- T.B.B. Building Services Limited2008
- Teccuk Limited2011
- The Spark & Hammer Ltd2026
- Trail Electrical Services Ltd2017
- Tritech Electrical Contractors Limited2015
All electrical contractors in Swanley · All trades in Swanley · Electricians across the UK
Frequently asked questions
When are Sentry Protection Ltd's accounts due?
Sentry Protection Ltd's next accounts are due at Companies House by 28 February 2027 (in 139 days), covering the period to 31 May 2026.
When is Sentry Protection Ltd's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is Sentry Protection Ltd still trading?
Sentry Protection 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 Sentry Protection Ltd do?
Sentry Protection Ltd is registered under Electrical installation (SIC 43210); Security systems service activities (SIC 80200); Fire service activities (SIC 84250).
How old is Sentry Protection Ltd?
Sentry Protection Ltd was incorporated on 3 May 2024, 2 years ago.
What is the penalty if Sentry Protection 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 Sentry Protection 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.