Annual accounts
Total Exemption Full accounts
30/06/2027Filing deadline
Made up to 30/09/2025Due 30/06/2027
- Next accounts made up to
- 30/09/2026
- Last accounts made up to
- 30/09/2025
MERCURY SECURITY SYSTEMS LTD
ActiveRegistry details
Reference data exactly as held at Companies House.
Copy registry details
- Registered office
- 9 Bridgegate Centre, Martinfield, Welwyn Garden City, Hertfordshire AL7 1JG
- Classification (4 SIC codes)
- Manufacture of doors and windows of metal (25.12 - SIC 2007)Electrical installation (43.21 - SIC 2007)Security systems service activities (80.20 - SIC 2007)Fire service activities (84.25 - SIC 2007)
- Accounts type
- Total Exemption Full
Company activity
The 4 most recent documents filed at Companies House.
Pre-Score for UK companies is coming soon
- 20/07/2026View PDF (3 pages)
Confirmation statement made on 2026-06-30 with no updates
- 05/03/2026View PDF (9 pages)
Total exemption full accounts made up to 2025-09-30
- 02/07/2025View PDF (3 pages)
Confirmation statement made on 2025-06-30 with no updates
- 17/06/2025View PDF (8 pages)
Unaudited abridged accounts made up to 2024-09-30
Coming soon
What Pre-Score will tell you
- Whether the filed accounts are strengthening or weakening year on year.
- Whether this company files on time, and how often its record changes.
- How its officers and controlling parties connect to other UK companies.
Accounts and confirmation statement
The two filings Companies House requires every year, and where each one stands against its deadline today.
On schedule
Confirmation statement
Confirms the registry record is up to date
14/07/2027Filing deadline
Last statement 30/06/2026Due 14/07/2027
- Next statement date
- 30/06/2027
- Last statement dated
- 30/06/2026
Financial performance
The latest figures MERCURY SECURITY SYSTEMS LTD filed. Okredo holds filed accounts data for 2021–2025; the year-by-year record is on the financials page.
Net Assets
£72.52K2025
527.13%vs 20242024: £11.56K
Total Assets
£1.55M2025
-13.24%vs 20242024: £1.79M
Cash in Bank
£40.31K2025
-12.57%vs 20242024: £46.11K
Total Liabilities
£1.47M2025
-16.85%vs 20242024: £1.77M
Employees
302025
-6vs 20242024: 36
Of the 4 measures with an earlier filing to compare against, 1 rose and 3 fell. Total liabilities moved furthest, down 16.85% on 2024. See the full financial analysis for MERCURY SECURITY SYSTEMS LTD.
The full financial record
Four ways through MERCURY SECURITY SYSTEMS LTD's filed accounts — the year-by-year numbers, the compound rates and the ratios behind them.
Net Assets · +147% a year (CAGR)Three-year trend, 2023–2025Every measure end to end across 2023, 2024 and 2025, with the compound rate behind each one.See what moved5 chartsCharts by indicator5 filed indicators plotted year by year, 2021–2025.Plot the figuresNothing estimatedRatios from the filed figures4 ratios computed from this company's own reported amounts, each shown against the year it was derived from.Check the ratios5 × 5 yearsEvery figure by yearAll 5 measures Okredo tracks across 5 reported years, exactly as filed.Open the table
Employees
Headcount as reported to Companies House for 2021–2025.
| Year | Employees | Change |
|---|---|---|
| 2025 | 30 | -6 |
| 2024 | 36 | +2 |
| 2023 | 34 | +4 |
| 2022 | 30 | +1 |
| 2021 | 29 | – |
Reported employee count increased from 29 in 2021 to 30 in 2025. See how headcount moved alongside the reported financials.
Credit report
It is a professional assessment of the company 's performance, revealing company's potential and risks, showing it's past experiences and revealing future prospects.
- Company potential
- Risk indicators
- Past performance
- Future prospects
Officers
6Directors, secretaries and other appointed officers, with the period each has served.
| Person | Role | Period | Connected companies |
|---|---|---|---|
| Corporate Secretary | 31/01/2013–30/06/2020 | 16 | |
| Director | 18/12/1997–Present | 4 | |
| Nominee Secretary | 28/02/2002–31/01/2013 | 154 | |
| Secretary | 17/12/1997–28/02/2002 | 0 | |
| Director | 01/02/2002–Present | 2 | |
| Secretary | 17/12/1997–17/12/1997 | 15 |
Persons with significant control
2Individuals or entities with significant control over the company, as declared to Companies House.
| Person | Period | Connected companies |
|---|---|---|
| 06/04/2016–06/04/2016 | 4 | |
| 23/12/2017–Present | 0 |
Filing history and recent activity
Every document on the Companies House record, newest first.
- Filings on record
- 8
- Since 30/06/2023
- Last 12 months
- 2
- Same as the year before (2)
- Most recent filing
- 20/07/2026
- 2 months ago
What changed in the last year
- Confirmation statementLatest 20/07/2026
- Accounts filedLatest 05/03/2026
Filing timeline
- 20/07/2026View PDF (3 pages)
Confirmation statement made on 2026-06-30 with no updates
- 05/03/2026View PDF (9 pages)
Total exemption full accounts made up to 2025-09-30
- 02/07/2025View PDF (3 pages)
Confirmation statement made on 2025-06-30 with no updates
- 17/06/2025View PDF (8 pages)
Unaudited abridged accounts made up to 2024-09-30
- 15/07/2024View PDF (9 pages)
Total exemption full accounts made up to 2023-09-30
- 03/07/2024View PDF (4 pages)
Confirmation statement made on 2024-06-30 with updates
- 13/07/2023View PDF (3 pages)
Confirmation statement made on 2023-06-30 with no updates
- 30/06/2023View PDF (10 pages)
Total exemption full accounts made up to 2022-09-30
See when the next accounts and confirmation statement are due
Similar companies
148 UK companies are similar to MERCURY SECURITY SYSTEMS LTD, sharing the same company status (Active), the same industry sector and activity group (Manufacture of doors and windows of metal) and a comparable number of employees. The 5 closest matches are shown below to help you compare competitors and industry peers.
X-MET FINISHING LIMITED
ActiveUnit 106/107 Howden Avenue, Newhouse Industrial Estate, Motherwell, North Lanarkshire ML1 5RX
- Activity
- Treatment and coating of metals
- Company no.
- SC431768
- Incorporated
- 03/09/2012
- Employees
- 0
L.P. FOREMAN & SONS LIMITED
Active1-4 Farrow Road, Widford Industrial Estate, Chelmsford, Essex CM1 3TH
- Activity
- Manufacture of light metal packaging
- Company no.
- 03122356
- Incorporated
- 06/11/1995
- Employees
- 35
LANDON ENGINEERING (CASTLE WORKS) LIMITED
ActiveUnit 5 St. Albans Road Industrial Estate, Stafford ST16 3DR
- Activity
- Manufacture of metal structures and parts of structures
- Company no.
- 01858095
- Incorporated
- 24/10/1984
- Employees
- 33
A. FARLOW (ENGINEERING) LTD
Active39 Ballynameen Road, Garvagh, BT51 5PN
- Activity
- Manufacture of metal structures and parts of structures
- Company no.
- NI042808
- Incorporated
- 22/03/2002
- Employees
- 36
LBS SECURITY SERVICES LIMITED
ActiveUnit 6 Sterling Trading Estate, Rainham Road South, Dagenham, Essex RM10 8TX
- Activity
- Manufacture of other fabricated metal products n.e.c.
- Company no.
- 03684674
- Incorporated
- 16/12/1998
- Employees
- 38
About MERCURY SECURITY SYSTEMS LTD
A short description of the company, written from its Companies House record.
MERCURY SECURITY SYSTEMS LTD is a private limited company registered in the United Kingdom, based in 9 Bridgegate Centre, Martinfield, Welwyn Garden City, Hertfordshire AL7 1JG. Companies House classifies its business as Manufacture of doors and windows of metal, one of 4 SIC classifications on its record. It has been on the register for 28 years 9 months.
The register currently records it as active. Its 2025 accounts report net assets of £72.52K and 30 employees.
MERCURY SECURITY SYSTEMS LTD: frequently asked questions
Answered from this company's own registry record and filed figures.
Companies House records MERCURY SECURITY SYSTEMS LTD under 4 registered business activities: Manufacture of doors and windows of metal (25.12 - SIC 2007), Electrical installation (43.21 - SIC 2007), Security systems service activities (80.20 - SIC 2007) and Fire service activities (84.25 - SIC 2007).
MERCURY SECURITY SYSTEMS LTD is recorded as active on the Companies House register, and has been on it since 18/12/1997.
The most recent accounts Okredo holds cover 2025 and report net assets of £72.52K, total assets of £1.55M, cash in bank of £40.31K and total liabilities of £1.47M.
The most recent document on the record is dated 20/07/2026: Confirmation statement made on 2026-06-30 with no updates, 2 months ago.
On the current registry record, accounts are due by 30/06/2027 and the next confirmation statement is due by 14/07/2027.
Companies House lists 6 officers (2 currently in post) and 2 people with significant control (1 current).