Dalycom is a complete business communications and IT service provider based in Leicestershire, UK. The company’s services include cloud based IT and telephony services, broadband, calls, lines & mobile, CCTV, wireless networks and support.

Dante provides project management services as well as commercial fire and security systems throughout the UK. The company has mechanical and construction divisions. Dante has achieved the quality standard ISO9001 and environmental standard ISO 14001. The company's specialisms include CCTV, door entry, intruder alarms, fire safety, and PA/VA.

DAS Technology can design, install and maintain security systems for a wide range of uses from homes, shops and offices to shopping centers, schools and car parks. They provide bespoke security solution that meets your needs, and all completely hassle free. Their nationwide network of engineers is trained to the highest standard in order to install security systems with a professional, efficient and reliable service.

Davis Site Security Limited was established 20 years ago by the late Kevin Davis, who gained the reputation of providing professional CCTV rental to the Construction Sector and to Vacant Sites in the West Midlands.

Demux Video Services Ltd is a leading forensic multimedia analysis and software company, specializing in the clarification and Demultiplexing of CCTV images and footage as well as audio material.

Design Automator is a SaaS solution for the security systems industry that automates the engineering process, eliminates human error and delivers system wide consistency, whilst saving both time and money.

Detego Global is the company behind award-winning Digital Forensics, Case Management, and Endpoint Monitoring solutions that are trusted by the military, law enforcement teams, intelligence agencies, and enterprises around the world. With the ever-increasing use of digital devices and the corresponding mass of data that are created, solutions have become the preferred choice for rapidly acquiring and analyzing.

Device Smart Ltd. have been developing Monitoring and Control Software & Middleware Platforms for over 15 years before cloud, before IOT, before "smart anything" was a buzz word.

DiffusionData is a pioneer in real-time data streaming and messaging solutions. Founded to solve the real-time systems & application connectivity and data distribution challenges experienced by companies worldwide, the company has an international team of business and technology experts. The company’s flagship offering — the Diffusion® Intelligent Data Platform, makes it easy to consume, enrich, and deliver data reliably.

dhf is a not-for-profit trade association for companies associated with Locks & Building Hardware; Doorsets; Industrial Doors & Shutters; Domestic Garage Doors and Automated Gates.

Doordeck provides mobile access control which embeds with a variety of door access control systems, making it easy for the user to unlock the door from the phone.

UK's Dragon Security Systems designs, installs and maintains security systems including CCTV surveillance, fire detection, intruder detection, and access control for commercial and domestic use. The company is NSI Gold approved and quality insured to provide the highest standard possible. Dragon Security Systems also schedules regular preventive maintenance checks to both its own installations and those systems installed by other companies.

Drone Major is a globally renowned drone and counter drone advisory service enabling clients to navigate the expanding applications of drone technology. Drone Major serves to advise on what is possible, where to acquire it, and how to integrate it safely and effectively.

DroneOps specializes in the commercial application of Small Unmanned Aerial Systems (SUAS) and robotics. They research and develop new capabilities for drones to work in the commercial, security and defence arenas.

Drumgrange Ltd is an independent defense contractor specializing in the development, integration and through-life support of military systems with a particular focus in the areas of Underwater Systems, Communications and Information Systems, VLF Communications, Navigation and Precise Timing Systems, Boat Systems Integration, Training and Simulation, Security Systems and RF Products.

EA Group (UK) Limited provides installation and support service within access control, parking and security market sectors. In 1995 Perimeter Security (EA) Limited was incorporated as part of Electro Automation Group of Companies to increase its product portfolio. EA Parking was established as a sister company to Perimeter Security, to supply, install and support a range of “Pay on Foot” Car Park equipment.

Eastern Voice and Data is a UK-based security and software solutions firm. They provide IP networking, VoIP, CCTV, WiFi, IT software, fiber optics, cabling, access control and cloud solutions.

With over thirty years of experience within the Scottish security industry, Eclipse (IP) Ltd serves the needs of organizations in both the public and private sectors, large and small, across Scotland. With locally based engineers, the company provides full service from initial consultation & design, to installation project management & after care. Eclipse offers security systems and safety solutions.

At EDSB, they believe that their culture sets them apart from the competitors. They’re a modern and progressive business with innovative ways of managing and supporting the people, and they also promote an inclusive and collaborative workplace culture, so that everyone feels at home.

UK's Electrical Fire & Security Solutions supplies, installs, maintains, and offers break down fault repair services to CCTV, access control, biometric systems, door entry, intercom, intruder alarm, perimeter alarm systems, fire alarm systems, automatic electric gates, vehicle barriers, and electrical systems. The company offers services to industrial, commercial and domestic installations in Hampshire, Dorset, Wiltshire, Berkshire, and London.