- Companies
- Electricians
- London
- DF Sec Ltd
DF Sec Ltd
- Company number
- 16099687
- Incorporated
- 25 Nov 20241 year trading
- Registered office
- 167-169 Great Portland Street, 5 Floor, London, W1W 5PF
- Nature of business
- Electrical installation; Security systems service activities
DF Sec Ltd is a 1-year-old private limited company registered in London, company number 16099687, one of 3,448 electrical contractors in London. Its next accounts are due at Companies House on 31 December 2027, and its first CT600 is due at HMRC on 30 November 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 30 November 2025, as filed at Companies House.
Where DF Sec Ltd is registered
The registered office is in London (W1W), in the Westminster local authority area, London. Show W1W 5PF on a map.
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- Energy Reward LtdMotor traders
- Holly’S Housekeeping LtdCleaning companies
Shared registered office
1,494 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 DF Sec 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 31 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 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
- 16099687
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 November 2024 (1 year ago)
- Registered office
- 167-169 Great Portland Street, 5 Floor, London, W1W 5PF
- Nature of business
- Electrical installation (SIC 43210)
Security systems service activities (SIC 80200) - Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 23 June 2026
- Previous names
- Biophilix Ltd (until 20 Jun 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.
- DFB Energy Ltd2020
- DG Project Management Ltd2026
- Dhruv Electrical Ltd2026
- Dial-An-Electrician Limited2015
- Dib-Group Ltd2021
- Didge Electrical & Building Services Ltd2026
- Didpitt Electrical Services Ltd2026
- Digipopup Ltd2023
All electrical contractors in London · All trades in London · Electricians across the UK
Frequently asked questions
When are DF Sec Ltd's accounts due?
DF Sec Ltd's next accounts are due at Companies House by 31 December 2027 (in 444 days), covering the period to 31 March 2027.
When is DF Sec 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 30 November 2026, due by 30 November 2027, 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 DF Sec Ltd still trading?
DF Sec 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 DF Sec Ltd do?
DF Sec Ltd is registered under Electrical installation (SIC 43210); Security systems service activities (SIC 80200).
How old is DF Sec Ltd?
DF Sec Ltd was incorporated on 25 November 2024, 1 year ago.
What is the penalty if DF Sec 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 DF Sec 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.