- Companies
- Electricians
- I.S.T.L. Fire & Security Limited
I.S.T.L. Fire & Security Limited
- Company number
- 16517634
- Incorporated
- 13 Jun 20251 year trading
- Registered office
- Unit 1, Bedwas Business Centre, Bedwas House Industrial Estate, Bedwas, Caerphilly, CF83 8DU
- Nature of business
- Electrical installation; Other specialised construction activities n.e.c.
I.S.T.L. Fire & Security Limited is a 1-year-old private limited company registered in Bedwas, company number 16517634, one of the UK's electrical contractors. Its next accounts are due at Companies House on 13 March 2027, and its first CT600 is due at HMRC on 12 June 2027.
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 I.S.T.L. Fire & Security Limited is registered
The registered office is in Bedwas (CF83), in the Caerphilly local authority area, Wales. Show CF83 8DU on a map.
Other trade companies in CF83
- Owen PM LimitedBuilders
- Ecamscymru LtdMachinery repair and installation
- Bee Green Plumbing Solutions LtdPlumbers and heating engineers
- Tyga Constuction LimitedBuilders
- Grip Rip MX LtdMotor traders
- Da' Grave LtdRepair services
- First Class Cleaning Solutions LtdCleaning companies
- Vehicle Accident Repairs Solutions LtdMotor traders
Also registered at this address
2 other companies use the same registered office as I.S.T.L. Fire & Security Limited.
- I.S.T.L. Domestic LimitedProperty developers
- I.S.T.L. Engineering LimitedElectricians
What happens if I.S.T.L. Fire & 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 13 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 14 Mar 2027 to 13 Apr 2027 | £150 |
| 1 to 3 months late | 14 Apr 2027 to 13 Jun 2027 | £375 |
| 3 to 6 months late | 14 Jun 2027 to 13 Sep 2027 | £750 |
| More than 6 months late | From 14 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 16517634
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 13 June 2025 (1 year ago)
- Registered office
- Unit 1, Bedwas Business Centre, Bedwas House Industrial Estate, Bedwas, Caerphilly, CF83 8DU
- Nature of business
- Electrical installation (SIC 43210)
Other specialised construction activities n.e.c. (SIC 43999) - Year end
- 30 June (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 12 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
Other active electrical contractors.
Frequently asked questions
When are I.S.T.L. Fire & Security Limited's accounts due?
I.S.T.L. Fire & Security Limited's next accounts are due at Companies House by 13 March 2027 (in 151 days), covering the period to 30 June 2026.
When is I.S.T.L. Fire & Security Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 12 June 2026, due by 12 June 2027, and one for the period to 30 June 2026, due by 30 June 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is I.S.T.L. Fire & Security Limited still trading?
I.S.T.L. Fire & 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 I.S.T.L. Fire & Security Limited do?
I.S.T.L. Fire & Security Limited is registered under Electrical installation (SIC 43210); Other specialised construction activities n.e.c. (SIC 43999).
How old is I.S.T.L. Fire & Security Limited?
I.S.T.L. Fire & Security Limited was incorporated on 13 June 2025, 1 year ago.
What is the penalty if I.S.T.L. Fire & 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 I.S.T.L. Fire & 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.