DHS Systems Int'l Ltd, with its business title of DHS Systems International, is the rebranded name of MilSys (UK) Ltd. This title better reflects that role of the company, which is to provide DRASH mobile infrastructure capabilities and solutions for defence, security and crisis relief organisations worldwide. DHS Systems Int'l Ltd remains a subsidiary of DHS Technologies LLC, which is based in Orangeburg, New York.

Diamond Security Systems (UK) Ltd is a specialist CCTV design, installation and maintenance company.

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.

Digital Grape Business Services is a specialist consulting services company with specific experience of international markets and technology projects. It is experienced in a wide range of technology markets involved with CCTV. The company's international business development support services provide resources for companies seeking to expand operations through international channel development as well as search services for M&A projects.

Digital ID specialises in all things ID and have stock from some of the biggest names in the industry. Digital ID is one of the leading providers of ID card printers from an array of respected manufacturers, including Magicard, Datacard, Evolis, Zebra and more. The company offers access control and smart cards, ID card and visitor systems, printable and printed ID cards, software, as well as accessories.

Digital Locksmiths Limited was founded by two former members of Smart Card Solutions: Sean Kelly & Martin Strauch. The Digital Locksmiths offer an unrivalled, independent capabiltity to help our clients provide the highly reliable, feature rich and cost effective products that customers demand.

The Digital RF offers two unique comprehensive detection systems for entrance security control. These systems offer of a number of automatic inspection and detection processes which enable the identification of suspect vehicles which may be equipped with I.E.D’s and Magnetic Bombs or Tracking Devices.

Through their 24/7 Security Operations Centre, DigitalXRAID delivers cyber security strategies to organisations that enhance the security posture and reduce the risk, cost, and reputational damage of a breach.

Diligence BSB Forensic is one of the UK's leading independent Forensic service providers to the Police, Legal Profession, Corporate and Fraud Investigators. BSB assesses clients' CCTV systems or assists in purchasing decision or tender review, reporting in terms of systems ability to provide forensic material to be used in evidence. BSB Forensic offers a range of training courses covering forensic audio, video, document or fingerprint evidence.

Distology are an award-winning cloud security distributor bringing a wealth of experience, extensive knowledge, strong relationships with mutual trust and respect across a huge breadth of partners covering the UK, Ireland and Benelux.

DLRS Group Security Concepts is Ireland’s largest security printer. Established since 1976, the company has production facilities in the Republic of Ireland and Northern Ireland, servicing the needs of major financial and government bodies.

DOM-UK Ltd. focuses on developing and offering high quality mechanical and access control solutions for residential and commercial applications. They provide smart access control, mechanical and digital locking solutions, including locks, lockcases, digital handles and cylinders, wall readers and terminals, trapped key interlocking systems and anti-tilt systems.

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.

Established in 1997, Door Controls Direct is a UK specialist online supplier of electromagnetic door closers and door control equipment with access to thousands of door hardware products. It also supplies digital locks, access control, electric locking, power supplies, and automatic door operators, as well as door hardware and fire escape hardware for buildings to comply with fire safety and security regulations.

The new combined Dorset & Wiltshire Fire and Rescue Service came into being on 1 April 2016, and now serves the local authority areas of Bournemouth, Dorset, Poole, Swindon and Wiltshire. They are ‘passionate about changing and saving lives’ – and are excited by the possibilities that are now open to them as a larger Fire and Rescue Service.

Dragonfly is a geopolitical and security intelligence service for organisations. Its comprehensive intelligence and analysis provide a forward-looking view of global risks and threats for strategic decision-making, opportunity identification, and risk mitigation.

Drax Group is a renewable energy company engaged in renewable power generation, the production of sustainable biomass and the sale of renewable electricity to businesses. Drax operates a generation portfolio of sustainable biomass, hydro-electric and pumped hydro storage assets across four sites in England and Scotland. It is the UK’s largest source of renewable electricity.

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.

Drumgrange Ltd is an independent defence contractor specialising 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.

DS Security is a pioneer UK Security company providing Security Services throughout the United Kingdom. Their security camera systems, access control and asset protection solutions provide a real deterrent and the peace of mind having a full record of any event or problem if needed.

DSSL Group is a specialsits in Closed Circuit Television, Access Control and Integrated Systems. The company expertise in development, installation, maintenance and integration of CCTV, access control (wireless, fibre and hard wired) and perimeter protection systems gained with various organisations.

Dukes Security offers security solutions designed to match users' unique requirements. From restaurants to commercial spaces, their services are affordable, flexible, and delivered by highly trained professionals.

Dunedin Facilities Management Ltd is an SIA Approved contractor, who's management and staff are veterans of law enforcement and the security industry. The company is a premier provider of security services like security guards, CCTV security, mobile patrol, door supervisors, key holding and event security solutions.

Durite are the leaders in Vehicle Safety and Auto Electrical Parts with over 5000 products available. Their goal is to provide simple yet effective solutions to their customers. Durite is the UK’s leading brand in auto electrical parts for the commercial and general vehicle aftermarkets, including trucks and vans, marine, agricultural and leisure vehicles.

DVV Solutions is a provider in the design, implementation and management of Third Party Risk Management (TPRM) and IT Security services. They have a proven model for Third-Party risk reduction and mitigation. Their suite of consultative and managed services improve the ability to manage increasing numbers and complexity of outsourced supplier risk backed by leading risk intelligence and automation platforms.

Southport's EFT Systems Ltd is one of the leading fire and security company. The company provides electrical/electronic security and fire safety systems, accredited to NSI ISO 9001, NICEIC AND JIB. EFT designs, installs, services, and maintains a range of systems, tailored to both domestic and commercial client requirements. The company offers security systems, access control, CCTV, fire protection, alarm monitoring, and specialist call systems.

e92cloud is a company in the 292 group, and offers cloud security VAD and built for the cloud generation. Some of the services listed on their website includes IT security, software defined networking, distribution, cyber security, cloud services.