- Companies
- Electricians
- Welwyn Garden City
- Sentrilink Security Ltd
Sentrilink Security Ltd
- Company number
- 17094420
- Incorporated
- 16 Mar 2026
- Registered office
- 28 Duncan Close, Welwyn Garden City, AL7 3XP
- Nature of business
- Electrical installation; Private security activities; Security systems service activities
Sentrilink Security Ltd is a newly incorporated private limited company registered in Welwyn Garden City, company number 17094420, one of 50 electrical contractors in Welwyn Garden City. Its next accounts are due at Companies House on 16 December 2027, and its first CT600 is due at HMRC on 15 March 2028.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where Sentrilink Security Ltd is registered
The registered office is in Welwyn Garden City (AL7), in the Welwyn Hatfield local authority area, East of England. Show AL7 3XP on a map.
Other trade companies in AL7
- Mechanicalwise LtdInstallers
- Azalea Services LimitedSpecialist contractors
- Malmech and Mannion LimitedMechanics and garages
- T&D Construction Group LtdFinishing trades
- Vertec Roofing and Building LtdRoofers
- Selectlane LtdMotor traders
- Af Pressure Washing LtdCleaning companies
- Jet Professional LtdCleaning companies
What happens if Sentrilink Security 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 16 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 17 Dec 2027 to 16 Jan 2028 | £150 |
| 1 to 3 months late | 17 Jan 2028 to 16 Mar 2028 | £375 |
| 3 to 6 months late | 17 Mar 2028 to 16 Jun 2028 | £750 |
| More than 6 months late | From 17 Jun 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 2029 | 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
- 17094420
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 16 March 2026
- Registered office
- 28 Duncan Close, Welwyn Garden City, AL7 3XP
- Nature of business
- Electrical installation (SIC 43210)
Private security activities (SIC 80100)
Security systems service activities (SIC 80200) - Year end
- 31 March (accounting reference date)
- Accounts type
- No accounts filed yet
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 Welwyn Garden City
Other active electrical contractors registered in Welwyn Garden City.
- Sloansway Limited2009
- SM Builders & Electricians Ltd2024
- Spear Electrical (London) Ltd2016
- Steven Setterfield Ltd2014
- TMG Electrics Ltd2021
- Warmspark Building Services Ltd2023
- Wayne Clark Electrical Limited2015
- WDL Electrical Ltd2021
All electrical contractors in Welwyn Garden City · All trades in Welwyn Garden City · Electricians across the UK
Frequently asked questions
When are Sentrilink Security Ltd's accounts due?
Sentrilink Security Ltd's next accounts are due at Companies House by 16 December 2027 (in 430 days), covering the period to 31 March 2027.
When is Sentrilink Security Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 15 March 2027, due by 15 March 2028, and one for the period to 31 March 2027, due by 31 March 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Sentrilink Security Ltd still trading?
Sentrilink Security 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 Sentrilink Security Ltd do?
Sentrilink Security Ltd is registered under Electrical installation (SIC 43210); Private security activities (SIC 80100); Security systems service activities (SIC 80200).
How old is Sentrilink Security Ltd?
Sentrilink Security Ltd was incorporated on 16 March 2026, less than a year ago.
What is the penalty if Sentrilink Security 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 Sentrilink Security 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.