Daifuku Airport Technologies is a solutions provider for airports worldwide. They specialise in airport operations and maintenance, baggage handling, self service technology, automated bag drop, baggage tray systems, tilt tray sorter, mobile inspection Table, early bag storage, hold bag screening, RFID and other solutions.

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.

Dardan Security’s smart security solutions go beyond safeguarding buildings, property and staff. It combines the best in technology, mobile services and physical guarding to protect the most valuable asset of all: reputation. Dardan Security has enjoyed strong organic growth by partnering with only quality clients who wish to join it on its journey.

Darktrace is a AI company which deals in cyber security, Intelligence and machine learning. The Enterprise Immune System uses machine learning and AI algorithms to detect and respond to cyber-threats across diverse digital environments, including cloud and virtualised networks, IoT and industrial control systems. Some of the products developed by the company include Darktrace Enterprise, Darktrace Industrial, Darktrace Cloud and Darktrace SaaS.

DAS Technology can design, install and maintain security systems for a wide range of uses from homes, shops and offices to shopping centres, 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.

Data Performance Consultancy Ltd. are Smart City specialists advising both local and central government on the development of smart cities for social impact. They are building a technology stack that looks to connect social innovation and develop the SME supply chains and in doing so create inclusive economic growth.

Databac installs new HP Indigo 5000 series digital printing line to enable personalization of cards on demand. They manufacture and supply cards in a variety of sizes and materials depending on the needs. These can incorporate a variety of reading technologies such as: Magnetic stripe (HiCo/LoCo/Watermark Magnetics®) Contact chip – such as SLE5542, SmartCafe,ID Prime; GemClub Memo RFID – all types Barcode (2D,QR and Infrared)

Databarracks is a pioneer in Public Cloud continuity. It delivers award-winning IT resilience and continuity services. It helps organisations get the most out of the cloud and protect their data, wherever it lives.

UK based Datasat Communications delivers remote communication solutions for governments, commercial organisations, and emergency services. Datasat designs and builds networks that deploy combination of satellite, wireless and fibre communication technologies to precisely meet business requirements. Datasat provides multi-site security, remote asset protection, perimetre security & access control, and traffic management.

Datastor integrate the best in proprietary equipment and software products to provide not only the optimum solutions to their clients individual needs but also one which communicates seamlessly with other key applications.

DataTracks provides cloud-based software solutions to help companies prepare compliance reports for filing with regulators worldwide such as SEC & FERC in the United States, ESMA, EBA, and EIOPA in the European Union, HMRC in the United Kingdom, ACRA in Singapore, SSM in Malaysia, CIPC in South Africa, and MCA in India.

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.

DC Solutions is a CCTV installer based in Luton.

At DDS (Digital Direct Security), they are passionate about delivering high-quality security solutions that give users peace of mind. With over 20 years of experience in the industry, they have established themselves as a trusted name, supplying high-quality products for next-day delivery throughout the UK to installers and resellers.

De La Rue works with governments, central banks and commercial organisations around the globe in producing banknotes, product authentication fighting illicit trade and counterfeiting and in the supply of key security components to the identity industry.

De Raat Security Products is one of the UK’s & Europe’s suppliers of security products. They offer a full comprehensive range of physical home, office and commercial security solutions. Their UK office is based in Corby, Northamptonshire and they hold around a 90% stock level of their full product offering here in the UK.

Deep Knowledge Group is a consortium of commercial and non-profit organisations active on multiple fronts in the realm of DeepTech and Frontier Technologies (AI, Longevity, FinTech, GovTech, InvestTech), ranging from scientific research to investment, entrepreneurship, analytics, media, philanthropy and more.

- Founded in 2009, Deep Secure is privately owned UK-based security software solutions firm. Services offered include Content Threat Removal, Content Transform, Policy Enforcement, Cyber Security, Data Security, Email Content Security, Web Content Security, Portal Protection, and Deep Content Inspection.

DeepAlert is an AI video analytics company and cloud-based system providing accurate object detection using artificial intelligence to deliver event-based, actionable alerts in real-time to enhance monitoring operations.

Defence Composites has built a long standing reputation in the Body Armour and Composites Industry. With over 25 years experience in the industry, Craig's experience of designing lightweight armour and his knowledge of composite materials gives the company the advantage of a unique level of expertise.

Delkia is a specialist engineering & technology company for safety-related & mission-critical systems. Its mission is to enable a safer, more resilient world through the provision of engineering and technological solutions.

Delta 5 Security specialises in providing security guard services in London and the surrounding areas. They also specialise in providing security industry-related training courses.

Department for Energy Security and Net Zero (DESNZ) is focused on the energy portfolio from the former Department for Business, Energy and Industrial Strategy (BEIS), in the United Kingdom (UK) government.

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.