Chubb is one of the UK's best‑known providers of fire safety and security solutions for businesses and organizations nationwide. Chubb's security solutions include CCTV, intruder alarm, access control technologies, and visitor management technologies. The fire safety range includes the most sophisticated detectors and alarms, through to fire extinguishers, fire suppression systems, and other essential products such as emergency lighting.

Chubb is a global leader in security and fire protection. Chubb provides security solutions including intruder, access control and CCTV systems, enhanced by rapid monitoring and response services. The company also provides panic attack alarms which are designed to provide reliable protection.

Church Street Security Systems is a security systems installer in the UK. The company provides CCTV, intruder alarms, access control, fire systems, audibile/24 hour monitoring and BT redcare/dual signaling to residential and commercial installations.

CIA Fire and Security Ltd, formerly Cirencester Intruder Alarms is a security systems provider in Cirencester, UK. The company offers intruder alarms, CCTV systems, access control, burglar alarms systems, gate automation and fire alarms etc.

CIE-Group are one of the UK's most innovative, independent distributors for IP access, door entry and audio visual equipment. They are the main UK supply partners for leading brands 2N, Akuvox & Axis, among many others and provide an end-to-end design-to-delivery service to installers and integrators.

Cinos is a specialist security and audio visual systems integrator, providing reliable cost effective solutions and professional services to public and private sector clients in the UK and overseas.

Cirium is the industry pioneer in aviation analytics; helping the aviation industry understand the past, present and predicting what will happen tomorrow in air travel.

The UK’s City Alarms specializes in the repair of old security systems. The company also offers intruder alarms, CCTV systems, access control, fire detection systems, door entry systems and locksmith services.

City Electrical Factors Ltd is a private limited company established in 1951. They are the United Kingdom’s leading Electrical Wholesale Network with almost twice as many distribution outlets as their nearest competitor.

CIVIC Security supplies, installs and maintains a complete range of security, communications and electrical services. The UK based company provides CCTV, access control, fire alarms and intruder alarms to residential, commercial and industrial sectors, including local authority housing, housing associations and government departments.

Clarion Security Systems Ltd is a security company in Manchester and are dedicated to the design, installation, service and maintenance of CCTV, Access Control, Intruder Alarms, Intercom, Visitor Management and Integrated Security Systems for commercial enterprises.