- Companies
- Plumbers and heating engineers
- Firefly (UK) Gas Ltd
Firefly (UK) Gas Ltd
- Company number
- 12847298
- Incorporated
- 31 Aug 20206 years trading
- Registered office
- Suite-B 42-44, Bishopsgate, Central London, EC2N 4AH
- Nature of business
- Plumbing, heat and air-conditioning installation
Firefly (UK) Gas Ltd is a 6-year-old private limited company registered in Central London, company number 12847298, one of the UK's plumbing and heating companies. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 2027.
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 £9,257 (+30%) on the year before, to £40K.
- Net assets rose in 3 of 4 year-on-year comparisons on record.
- Current assets of £66K against £26K owed within a year: 2.5 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2025 | £40K | £66K | £26K | 0 | |
| 31 Aug 2024 | £31K | £178K | £147K | 0 | |
| 31 Aug 2023 | £46K | £137K | £91K | 0 | |
| 31 Aug 2022 | £24K | £31K | £6,962 | 0 | |
| 31 Aug 2021 | £100 | £100 |
Where Firefly (UK) Gas Ltd is registered
The registered office is in Central London (EC2N), in the City of London local authority area, London. Show EC2N 4AH on a map.
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Also registered at this address
2 other companies use the same registered office as Firefly (UK) Gas Ltd.
- Huntsmead Partners LimitedProperty developers
- Woburn CT Estates LimitedProperty developers
What happens if Firefly (UK) Gas 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 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 12847298
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 31 August 2020 (6 years ago)
- Registered office
- Suite-B 42-44, Bishopsgate, Central London, EC2N 4AH
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 30 August 2026
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies
Other active plumbing and heating companies.
Frequently asked questions
When are Firefly (UK) Gas Ltd's accounts due?
Firefly (UK) Gas Ltd's next accounts are due at Companies House by 31 May 2027 (in 230 days), covering the period to 31 August 2026.
When is Firefly (UK) Gas Ltd's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is Firefly (UK) Gas Ltd still trading?
Firefly (UK) Gas 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 Firefly (UK) Gas Ltd do?
Firefly (UK) Gas Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Firefly (UK) Gas Ltd?
Firefly (UK) Gas Ltd was incorporated on 31 August 2020, 6 years ago.
What is the penalty if Firefly (UK) Gas 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 Firefly (UK) Gas 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.