- Companies
- Civil engineering
- London
- Fibre Spark Ltd
Fibre Spark Ltd
- Company number
- 15434633
- Incorporated
- 23 Jan 20242 years trading
- Registered office
- 102 Anerley Road, London, SE19 2AN
- Nature of business
- Construction of utility projects for electricity and telecommunications
Fibre Spark Ltd is a 2-year-old private limited company registered in London, company number 15434633, one of 1,853 civil engineering contractors in London. Its next accounts are due at Companies House on 31 October 2027, and the CT600 for the period to 31 January 2027 is due at HMRC on 31 January 2028.
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 up £6,245 (+536.5%) on the year before, to £7,409.
- Current assets of £14K against £31K owed within a year: 0.5 times cover.
- 2 employees on average, down from 5 the year before.
- Balance sheets on record for 2 years, 2025 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2026 | £7,409 | £14K | £31K | 2 | |
| 31 Jan 2025 | £1,164 | £19K | £19K | 5 |
Where Fibre Spark Ltd is registered
The registered office is in London (SE19), in the Bromley local authority area, London. Show SE19 2AN on a map.
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What happens if Fibre Spark 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 October 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2027 to 30 Nov 2027 | £150 |
| 1 to 3 months late | 1 Dec 2027 to 31 Jan 2028 | £375 |
| 3 to 6 months late | 1 Feb 2028 to 30 Apr 2028 | £750 |
| More than 6 months late | From 1 May 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2028 | £200 |
| 3 months late | 30 Apr 2028 | another £200 |
| 6 months late | 31 Jul 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 15434633
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 January 2024 (2 years ago)
- Registered office
- 102 Anerley Road, London, SE19 2AN
- Nature of business
- Construction of utility projects for electricity and telecommunications (SIC 42220)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 January 2026
- Last confirmation statement
- 22 January 2026
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in London
Other active civil engineering contractors registered in London.
- Fibredre Ltd2023
- Fimm Ltd2026
- First Fix Electrical Ltd2020
- Firstpoint Connections Ltd2025
- Fiskerton Bess Limited2022
- Fisniku Civil Engineering Ltd2026
- Fivenines Engineering Ltd2025
- Flexion Energy UK Storage Ltd2021
All civil engineering contractors in London · All trades in London · Civil engineering across the UK
Frequently asked questions
When are Fibre Spark Ltd's accounts due?
Fibre Spark Ltd's next accounts are due at Companies House by 31 October 2027 (in 384 days), covering the period to 31 January 2027.
When is Fibre Spark Ltd's CT600 due?
The CT600 for the period to 31 January 2027 is due at HMRC by 31 January 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2027.
Is Fibre Spark Ltd still trading?
Fibre Spark 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 Fibre Spark Ltd do?
Fibre Spark Ltd is registered under Construction of utility projects for electricity and telecommunications (SIC 42220).
How old is Fibre Spark Ltd?
Fibre Spark Ltd was incorporated on 23 January 2024, 2 years ago.
What is the penalty if Fibre Spark 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 Fibre Spark 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.