Corelight is one of the most powerful network visibility solution for information security professionals. The company provide real-time data that organisations use to understand, detect, and prevent cyber attacks. Their cyber security solution is built on Zeek, the powerful and widely-used open source monitoring framework. They also provide Intrusion Detection, Cyber Security, Zeek, Network Security Monitoring, NSM, Network Traffic Analysis.

CornerStone is an independent, international consultancy firm providing range of security services. The company helps organisations protect their people, assets, intellectual property and profits by identifying threats and minimising the risks. CornerStone's consultants have wide range of commercial and security experience and are kept up-to-date with latest developments in Biometrics, Digital Video and Radiological Detection, etc.

Cortexica are pioneers in AI, Machine Learning and Computer Vision for image and video analysis. They are focused on creating and turning cutting-edge AI and machine learning research into real world solutions that make businesses commercially stronger.

Croma Security Solutions Group PLC (CSS Group PLC) is an AIM-quoted total security services provider. The company specialises in guarding, electronic security, CCTV, intruder alarms, video analytics, access control, Biometrics, keyholding, close protection, fire alarms, revenue parking, private investigation, locksmithing, and physical security. CSS' Fastvein Time & Attendance is a biometric attendance and people clocking solution.

Crown Security Products is devoted to providing clients with the best and most advanced security products available.

CSG UK PLC specialise in the installation, maintenance and support of security systems for companies and organisations throughout the UK and Europe. CSG UK supply and install comprehensive security systems for national chains and individual businesses in the form of: CCTV, Access Control, Public Address, Intruder Detection and EAS (Electronic Article Surveillance), Fire and Safes.

Established in 2005, Cultris Security Systems Inc. is a full-service fire, security, access control, video and communications company. They specialise in intrusion detection, access control, and video surveillance systems for commercial and residential customers.

CyberLink Corporation develops & owns over 200 patented technologies providing multimedia software & AI facial recognition. Their product line includes PC & mobile applications for playback of movies & media, editing of videos & photos, & disc burning & backup solutions. Their AI facial recognition technology delivers solutions that are critical to AIoT applications such as smart retail, smart security & surveillance, smart city & smart home.

Cybersecurity and Infrastructure Security Agency leads the national effort to protect and enhance the resilience of the nation's physical and cyber infrastructure. CISA's multi-faceted mission is home to more than 15 career fields, including business administration, cybersecurity, programme management, communications, data science.

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.

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.

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.

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)

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.

Delaney Hardware is a renowned provider of premium builder hardware for residential homes, multi-family buildings, and commercial projects. As part of the Sargent and Greenleaf (S&G) family of brands, Delaney offers a full portfolio of hardware including door hardware, digital locks, barn door hardware, bath accessories, commercial hardware, trim hardware, steel doors and frames.

Delaney Secure Ltd is an IT security distributor specialising in biometric authentication, door entry systems and PCI DSS compliance. Leading stockist of door entry solutions, time and attendance, fingerprint readers, palm vein readers, iris scanners, face recognition and OEM biometric hardware and software solutions.

With more than 100,000 professionals, Deloitte provides audit and assurance, tax, consulting, and risk and financial advisory services to a broad cross-section of the largest corporations and governmental agencies.

Denning Electronics has solved big communications, protection, and surveillance problems by providing sales and technical support to distributors, security system integrators, engineering design firms, architects, and system users. Their specialties include outdoor intrusion detection, video and audio surveillance, video/audio/data networks and transmission, access control, and ballistic/blast/chemical/acoustic barriers.

Detection Technology is a global provider of X-ray imaging solutions for medical, security and industrial applications. Their product portfolio ranges from photo-diodes to complete detector systems with ASICs, electronics, mechanics and software.

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