Custom Security Services is one of the South's leading independent providers of fire, security and safety systems. The company offers a comprehensive design, installation and maintenance service for all types of security related projects. With over 25 years experience the company has successfully delivered thousands of quality installations to all types of customers, including domestic, commercial, and public sector.

Cyan Forensics is an Edinburgh-based company that builds technologies to help law enforcement quickly find and block harmful content. Cyan Forensics provides digital forensics software to help police forces find evidence on computers many times faster than before, doing in minutes what can currently take days.

Cyberhomes is a UK-based provider of smart home installations including CCTV and security applications.

CYFOR Secure is the dedicated cyber security division of CYFOR, specializing in a breadth of proactive and reactive IT security services, with expertise in Digital Forensics and Incident Response (DFIR). We are a trusted provider to SMEs and large enterprises globally, spanning numerous sectors that include manufacturing, legal, engineering, healthcare, finance, and telecommunications.

Cygnus SD specializes in providing quality CCTV – IP and analog – , access control products and accessories to the UK security trade.

CyNam is a Community Interest Company based in Cheltenham, the cradle of UK cyber innovation. The goal of CyNam is to bring together the best technology minds from local SME’s and Startups to fully harness the rich cyber security ecosystem that flourishes around Cheltenham, the home of the National Technical Authority for Information Security, GCHQ.

Cynon Valley Crime Reduction Services Limited is a non-for-profit social enterprise which is now in its 10th year of trading. It was set up to support the Charity side (Cynon Valley Crime Prevention Association) with sustainable funding, by providing security services across the country, these include fitting of security products like intruder alarm systems, CCTV, access control systems, UPVC locking systems, and key suiting/cutting services.

D & A Systems is an engineering company, providing electrical and specialist services to industry and commerce. The company offers electrical engineering services, high voltage construction and maintenance, electrical testing and inspection, quality power management, public address & voice alarm systems, CCTV & access control systems, and data network structured cabling.

D&D Security Derby offers fully licensed SIA-approved security guards that are ready to be deployed within hours upon acceptence. It provides approved contractor security services for major companies across the UK. Specialists in static guarding, it offers a cost-effective security service for the protection of UK businesses.

Daifuku Airport Technologies is a solutions provider for airports worldwide. They specialize 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.

Dantech Electronic Engineering is a UK manufacturer who has the capability to design, develop and produce products for the global security industry. For more than 40 years, the company has designed, developed and manufactured electronic equipment. This includes a large variety of electronic security products, including unique range of power supplies and ancillary equipment specifically engineered to service the global security industry.

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.

Darfen is a manufacturer of perimeter fencing products as well as access control solutions.

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.

DAS Technology are technology specialists with over a decades experience delivering solutions for both commercial and domestic customers. Their security division is full of specialists in CCTV, access control, door entry and fire.

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 is a specialist manufacturer and supplier of cards, ID systems and related products. The company produces plain and technology cards, software for visitor ID, event registration, product tracking, card/tag personalisation and encoding and end-to-end solutions for access control, time & attendance, loyalty and more.

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)

Dataflex is a leading designer and manufacturer of carrier-grade Multi Service Access Gateways, Integrated Access Devices (IADs) and M2M solutions.

DataScope is one of the UK’s leading providers of temporary site access control and time and attendance systems for the construction sector. The company supports some of the largest and prestigious construction and security companies on major development projects all over the UK.

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.

Since its formation in 1989, Davies Security Group has been designing bespoke security systems for its clients from all areas of the marketplace. From standalone Fire, Intruder and CCTV systems to PC-based integrated solutions, Davies Security can provide for all specifications, incorporating the latest technology from the fast moving security sector designed individually to accommodate present and future security needs.

DC Solutions is a CCTV installer based in Luton.

De La Rue works with governments, central banks and commercial organizations 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.