£129k
+2388%vs Mar 2024Active14718121Private limited companyLondon
BLUE SIREN LTD
Significant control: Ceo Janet Stiles (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From public filings as at 31 Aug 2026; may contain errors or be out of date.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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What does Blue Siren Ltd sell?
Registered activity: Manufacture of electronic measuring, testing etc. equipment, not for industrial process control (SIC 26511). We’re building product and service lists for UK companies. Get this one when it’s ready.
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01
Summary
BLUE SIREN LTD is an active private limited company (company number 14718121) incorporated on 9 March 2023, registered in London. Its registered activity is manufacture of electronic measuring, testing etc. equipment, not for industrial process control (SIC 26511). Latest micro accounts cover the period ending 31 March 2025, showing net assets of £129k, with 1 employee on average. As micro-entity accounts, no profit and loss account is filed, so turnover and profit are not public. Net assets rose 2388% on the prior period (£5,175).
Peer position · net assets
By net assets it sits in the top quarter of 87 comparable companies in London (median £4,084, upper quartile £79k).
02
Ownership and control
- Ceo Janet Stiles
- owns 75–100% of shares
- holds 75–100% of voting rights
- can appoint or remove directors
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
- 9 March 20233 yrs ago
- Next accounts due
- 31 December 2026in 67 days
- Confirmation statement due
- 23 March 2027in 149 days
Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.
04
Activity
- SIC 26511
- Manufacture of electronic measuring, testing etc. equipment, not for industrial process control
- SIC 63110
- Data processing, hosting and related activities
- SIC 74901
- Environmental consulting activities
- Accounts type
- Micro Entity
- Size band
- MicroCompanies Act thresholds
05
Financials
Not reported
Not disclosed
1
No changevs Mar 2024| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 31 March 2025 | £129k | — | — | — | — | — | 1 |
| 31 March 2024 | £5,175 | — | — | — | — | — | 1 |
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 above zeroNet assets £128,764 at 31 March 2025
- Net assets up 10% or more on the prior period+2388.2% vs prior period
- Incorporated two to five years agoIncorporated 9 March 2023
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 149 days
- Next accounts duein 67 days
- Accounts period endNet assets £129k · micro accounts
- Accounts period endNet assets £5,175 · micro accounts
- Incorporated
08
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All companies incorporated on 9 March 2023 · in Mar 2023.
09
Reminders for BLUE SIREN LTD
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.