Quantum was established in 1993 and handles all aspects of fire alarm, CCTV and security system installations from design through to commissioning, and offer a comprehensive upgrade and maintenance service. Quantum also offers a consultation and design service for audiovisual projects such as presentation and training rooms, distributed TV and video conferencing.

Quatro's remote HD alarming and CCTV solutions are wireless and battery powered. They are currently deployed in thousands of locations across the globe; helping customers effectively and efficiently protect, manage and monitor their sites.

Quest Fire & Security Provides homes and business with tailor made security systems that include burglar alarms, CCTV systems, wireless burglar alarms, fire alarm systems, in addition to alarm maintenance, intruder alarms, fire extinguishers and alarm monitoring.

Quicksafe.co.uk have supplied security systems to customers ranging for domestic home owners, professional security installers, businesses and government institutions. Based in Brighton, the company's clients include the UK ministry of Defense, British Aero Space, The Royal Marines, local health boards and major UK businesses. Quicksafe.co.uk specialize in Wireless GSM (Mobile phone compatible) and GPS security systems.

QVIS is UK’s pioneer CCTV distributor and they provide LED lighting, security & monitoring equipment for professional installers worldwide. Their products are designed to the highest standard, are inspired by technology and innovation whilst retaining fundamental core values in functionality and reliability.

R.J. Coleman provides installation of intruder alarm and security lighting, and maintenance of burglar alarm. The company operate out of their head office in Scunthorpe on major construction programmes across the UK. R.J. Coleman client base in varies including commercial factories, shops, agricultural, public houses, nightclubs, local government and domestic clients.

Established in 1998, Racam Security & Communications Ltd. specialises in the design, supply, installation, commissioning and maintenance of many types of security and communications systems. Racam Security & Communications' systems range from domestic intruder alarm systems to large public space CCTV systems and include police, local authorities, casinos and defense contracts.

Radio Data Technology went into liquidation on 13th August 2013 and now AMG Systems is manufacturing RDT products. AMG Systems is a leading UK manufacturer and global provider of video and communication transmission solutions designed for CCTV surveillance operations in transport, public, government and military sectors.

Radio Physics has spent several years inventing and augmenting millimetre wave radar technology to effectively and accurately detect concealed threats at distances up to 30 metres. In doing so, Radio Physics has become the world leader in standoff concealed threat detection, reliably detecting PBIED's (bomb vests), Assault Rifles, Machine Pistols and large bladed weapons.

Radiocoms Systems Ltd offer their customers a total communication system: specialist teams that combine a wealth of engineering knowledge and unwavering support to deliver a powerful tool that addresses varied businesses challenges, boosts efficiency and enhances the overall safety practices.

Raidocontact Ltd is a manufacturer and installer of specialist security and communication systems. Radiocontact's client base includes airports, banks, government establishments, hospitals and railways. The company manufactures closed circuit television, house security systems and specialized fabrication of panels as well as controls.

Formed in 2004, Radius Security Systems Ltd is a North West security expert and provider of door supervision and event security. Radius Security Systems Ltd covers a wide range of areas throughout the North West and Yorkshire. Radius Security Ltd holds SIA approved contractor status for the provision of Door Supervision. Radius Security Systems operates mainly in the commercial, industrial and public sectors of London and the South East.

Rainbow provides a range of IP and analog security solutions.

Incorporated in 1977, Rainbow Security Systems is part of Rainbow Electrical & Security Systems Ltd. Based in Northampton, England, Rainbow Security Systems specialises in the installation and maintenance of intruder alarms systems to domestic dwellings. Its clientele includes the premier national house builders David Wilson Homes, Westbury Homes, Persimmon Homes, Charles Church Homes and King of Oak Homes.

Rampart Security Ltd are installers of Security Systems to British Standard 4737 ISO 9000 and NACOSS. Rampart Security is an established business with over 12 years experience in the security industry. With extensive expertise and knowledge, the company designs, installs, and maintains, a comprehensive range of security systems to suit customer needs.

Rapid Action Security is a private security service in the United Kingdom, based in Leeds, committed to providing unrivalled commercial and residential security solutions. They are a reliable and trusted security solutions provider with a committed and reliable workforce.

Rapide Security & Surveillance Ltd. is the Midlands leading installer of commercial security systems, house alarms, automatic and manual fire alarms, closed circuit television systems, door access control, as well as fully integrated solutions including personnel attack and hold up alarms. Rapide Security & Surveillance is a NSI “Gold” approved installer of security systems and is also certified to the international quality standard ISO 9001.

Raven Security Solutions Ltd offer all kinds of security services tailored to your companies individual needs to protect your staff premise and stock.

Since 1985, Raysil Security Systems Limited has been designing and installing integrated security systems to the highest industry standards, collecting certifications - NSI, LPS 1014, ISO 9001-2000 and approvals - police authorities, home office, major insurers - along the way.