- Companies
- Installers
- Slough
- Siege Fire Systems Limited
Siege Fire Systems Limited
- Company number
- 08705821
- Incorporated
- 25 Sep 201313 years trading
- Registered office
- Suite G7 the Priory Stomp Road, Burnham, Slough, SL1 7LW
- Nature of business
- Other construction installation
Siege Fire Systems Limited is a 13-year-old private limited company registered in Slough, company number 08705821, one of 73 installation companies (insulation, lifts, shutters and similar) in Slough. Its next accounts are due at Companies House on 30 June 2027, and the CT600 for the period to 30 September 2026 is due at HMRC on 30 September 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 £68K (+56%) on the year before, to £190K.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £445K against £251K owed within a year: 1.8 times cover.
- 4 employees on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Sep 2025 | £190K | £87K | £445K | £251K | 4 |
| 30 Sep 2024 | £122K | £29K | £676K | £504K | 4 |
| 30 Sep 2023 | £128K | £32K | £763K | £542K | 8 |
| 30 Sep 2022 | £77K | £87K | £792K | £772K | 8 |
| 30 Sep 2021 | £1 | £44K | £404K | £419K | 12 |
| 30 Sep 2020 | -£56K | £56K | £290K | £309K | 4 |
| 30 Sep 2019 | -£47K | £44K | £232K | £283K | 4 |
| 30 Sep 2018 | £2,548 | £28K | £233K | £214K | 1 |
| 30 Sep 2017 | £2,835 | £5,473 | £191K | £212K | 2 |
| 30 Sep 2016 | £5,447 | £3,808 | £83K | £97K |
Where Siege Fire Systems Limited is registered
The registered office is in Slough (SL1), in the Buckinghamshire local authority area, South East. Show SL1 7LW on a map.
Other trade companies in SL1
- Yanky Construction LtdBuilders
- Westside Automotive LtdMotor traders
- Shadeworks LtdInstallers
- Yad Building Services LimitedBuilders
- Slough Vehicle Repair Centre LtdMechanics and garages
- Hadi Automotive LtdMotor traders
- Imperial Berkshire Motors LtdMotor traders
- MDN General LtdBuilders
What happens if Siege Fire Systems 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 30 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jul 2027 to 31 Jul 2027 | £150 |
| 1 to 3 months late | 1 Aug 2027 to 30 Sep 2027 | £375 |
| 3 to 6 months late | 1 Oct 2027 to 31 Dec 2027 | £750 |
| More than 6 months late | From 1 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 08705821
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 September 2013 (13 years ago)
- Registered office
- Suite G7 the Priory Stomp Road, Burnham, Slough, SL1 7LW
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 30 September (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 20 September 2026
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in Slough
Other active installation companies (insulation, lifts, shutters and similar) registered in Slough.
- Simply Carpet Fitters Ltd2025
- SJF Imperium Construction & Engineering Limited2024
- Thames Valley Insulation Limited2016
- Thermador Installation Limited2026
- Thermamax Ltd2025
- Vexia Limited2026
- Vibra Energy Ltd2023
- VPM Ceilings and Dry Lining Ltd2026
All installation companies (insulation, lifts, shutters and similar) in Slough · All trades in Slough · Installers across the UK
Frequently asked questions
When are Siege Fire Systems Limited's accounts due?
Siege Fire Systems Limited's next accounts are due at Companies House by 30 June 2027 (in 260 days), covering the period to 30 September 2026.
When is Siege Fire Systems Limited's CT600 due?
The CT600 for the period to 30 September 2026 is due at HMRC by 30 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2027.
Is Siege Fire Systems Limited still trading?
Siege Fire Systems Limited is listed as active on the Companies House register (checked 13 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 Siege Fire Systems Limited do?
Siege Fire Systems Limited is registered under Other construction installation (SIC 43290).
How old is Siege Fire Systems Limited?
Siege Fire Systems Limited was incorporated on 25 September 2013, 13 years ago.
What is the penalty if Siege Fire Systems 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 Siege Fire Systems Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.