−£1,577
vs Feb 2024Active08407986Private limited companyLondon
BLACKBOX SYSTEMS ENGINEERING LIMITED
Significant control: Katrina Claire Williams (25–50%), Philip David Williams (75–100%)
From public filings as at 31 Aug 2026; may contain errors or be out of date. Verify at Companies House · Terms
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Registered activity: Business and domestic software development (SIC 62012). We’re building product and service lists for UK companies. Get this one when it’s ready.
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01
Summary
BLACKBOX SYSTEMS ENGINEERING LIMITED is an active private limited company (company number 08407986) incorporated on 18 February 2013, registered in London. Its registered activity is business and domestic software development (SIC 62012). Latest micro accounts cover the period ending 28 February 2025, showing net assets of −£1,577, with 2 employees on average. As micro-entity accounts, no profit and loss account is filed, so turnover and profit are not public. Net assets fell 78% on the prior period (−£885).
Peer position · net assets
By net assets it sits in the bottom quarter of 15,170 comparable companies in London (median £702, upper quartile £27k).
02
Ownership and control
- Mrs Katrina Claire Williams
- owns 25–50% of shares
- Mr Philip David Williams
- owns 75–100% of shares
Persons with significant control hold 25% or more of shares or voting rights. Smaller shareholdings are only listed in confirmation-statement documents. Directors and secretaries: see the officers list at Companies House.
03
Key dates
- Incorporated
- 18 February 201313 yrs ago
- Next accounts due
- 28 November 2026in 35 days
- Confirmation statement due
- 4 March 2027in 131 days
Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.
04
Activity
- SIC 62012
- Business and domestic software development
- Accounts type
- Micro Entity
- Size band
- MicroCompanies Act thresholds
05
Financials
Not reported
Not disclosed
2
No changevs Feb 2024| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 28 February 2025 | −£1,577 | — | — | £16k | — | — | 2 |
| 29 February 2024 | −£885 | — | — | £16k | — | — | 2 |
Current ratio0.9Current assets ÷ creditors within one year
Figures as filed in iXBRL accounts at Companies House. "—" means the line was not reported in that filing; micro-entity accounts contain no profit and loss account.
06
Filing and accounts signals
- Net assets below zeroNet assets £-1,577 at 28 February 2025
- Net assets down 25% or more on the prior period-78.2% vs prior period
- Current assets below creditors within one yearCurrent ratio 0.9
- Incorporated five or more years agoIncorporated 18 February 2013
Neutral facts read from the register and filed accounts, each with its evidence. They are not a rating, a prediction or advice, and may be incomplete or out of date. How each signal is derived.
07
Timeline
- Confirmation statement duein 131 days
- Next accounts duein 35 days
- Accounts period endNet liabilities £1,577 · micro accounts
- Accounts period endNet liabilities £885 · micro accounts
- Incorporated
08
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All companies incorporated on 18 February 2013 · in Feb 2013.
09
Reminders for BLACKBOX SYSTEMS ENGINEERING LIMITED
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.