- Bell Security Ltd.
 - Supply, installation, maintenance, and servicing of high security equipment. - Classic Security Services
- Specialise in CCTV and security systems for commercial or domestic use.
- CMR Security Systems Ltd
- Offers sales, installation, and service of CCTV, access control, and PIDS systems.
- DOMSAT Limited
- Electric security fencing, automatic gates and ancillaries.
- Eagle Security Solutions
- Sells, installs, and maintains intruder alarms, CCTV, and access control systems for domestic and commercial premises.
- Mastiff Electronic Systems Ltd.
- Design, manufacture and install door access control systems for large and small organisations.
- Secure-A-Site UK Ltd
- Offering scaffolding security systems and lighting services throughout the U.K.
- Security Access Systems
- Installs, maintains, and repairs security gates, barriers, road blockers, and turnstiles.
- Security Support Products Ltd
- Operates in the electronic access control and security sector.
- Shef-Guard
- Security installation and maintenance specialists in the North of England.
- Tringmain Security
- Develops and installs security systems including access control, CCTV, entry systems, and automatic gates.
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