SELECTAMARK SECURITY SYSTEMS PLC
Company number 01024280 · Active · Locksbottom BR6 8NL
SELECTAMARK SECURITY SYSTEMS PLC is an active private limited company (company number 01024280) incorporated on 16 September 1971, registered in Locksbottom. Its registered activity is security systems service activities (SIC 80200). Latest full accounts cover the period ending 31 October 2025, showing net assets of £3.59m and cash of £3.02m, with 20 employees on average. Turnover was £4.69m and profit for the year £445k. Net assets rose 4% on the prior period (£3.44m). Across the last 3 periods on record the net-asset trend is rising.
By net assets it sits in the top quarter of 565 comparable companies in Greater London (median £3,393, upper quartile £35k).
Key dates
- Incorporated
- 16 September 1971
- Next accounts due
- 31 July 2027 — in 286 days
- Confirmation statement due
- 30 September 2027 — in 347 days
Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.
Activity
- SIC 80200
- Security systems service activities
- Accounts type
- Full
- Size band
- Small (Companies Act thresholds)
Financials — 4 periods on record, latest ending 31 October 2025
| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 31 October 2025 | £3.59m | £3.02m | £265k | — | £4.69m | £445k | 20 |
| 31 October 2024 | £3.44m | £2.73m | £325k | — | £4.87m | £812k | 20 |
| 31 October 2023 | £2.63m | £1.97m | £203k | — | £4.37m | £766k | 19 |
| 31 October 2022 | — | — | — | — | — | — | — |
- Net margin
- 9.5%
- Cash per employee
- £151k
Figures as filed in iXBRL accounts at Companies House. "—" means the line was not reported in that filing.
Firmoscan score: 77/100 (grade B)
- +10 Positive net assets — Net assets £3,588,631 at 2025-10-31
- +4 Cash reserves — Cash £3,017,603
- +5 Multi-year filing history — 4 periods on record
- +8 Established — Incorporated 1971-09-16 (55 years)
A transparent, rules-based score from filed data only: every point lists its evidence. It is not a credit rating or advice.
Ownership and control
- Mrs Susan Ann Brown — has significant influence or control · since 1 May 2016
- Mr James Alexander Brown — owns 25–50% of shares · since 26 January 2025
- Mr Jason Brown — owns 25–50% of shares · since 26 January 2025
- Mr James Garfield Brown — owns 25–50% of shares · since 1 May 2016 · ceased 10 April 2024
Persons with significant control hold 25% or more of shares or voting rights. Smaller shareholdings are only listed in confirmation-statement documents.
Similar companies in Greater London
Same activity (security systems service activities), closest in incorporation date.
- ASSOCIATED SECURITY ALARMS LIMITED — Croydon, inc. Sept 1972
- ASSOCIATED SAFE COMPANY LIMITED — Croydon, inc. Jul 1970
- ASSOCIATED LOCK SERVICES LIMITED — Croydon, inc. Sept 1973
- ASSOCIATED SECURITY GROUP LIMITED — Croydon, inc. Jul 1975
- ASSOCIATED CCTV SYSTEMS LIMITED — Croydon, inc. Jul 1975
- ASSOCIATED SECURITY GRILLES LIMITED — Croydon, inc. Jun 1976
Reminders for SELECTAMARK SECURITY SYSTEMS PLC
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.