Crisma Security is an Italian company that has dedicated itself to physical and logical security. Thanks to the expertise of qualified electrical engineers, the company designs and constructs perimeter security and anti-intrusion systems, CCTV, access control, RTLS systems, wireless networks and road safety systems.

Critec Consult is a security consultancy firm offering expert advice, design and technical services for end users, architects and installers. Critec's personnel have experience in designing and implementing integrated systems involving intruder detection, analogue and digital CCTV, access control, physical security, building management for high profile projects in the UK, Europe and the Middle East uch as military bases, VIP residencies, etc.

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.

Crosby Intruder Alarms offer full design, installation, service, repair and maintenance to hardwired alarm systems, CCTV, access control, security lighting, fire alarms, local area paging, caravan park security, and door entry systems.

Crown Securities (UK) Ltd is an NSI (NACOSS) Gold approved installer of Security systems, meeting the requirements of Insurance Companies & Police Authorities throughout the Northwest, Midlands & North Wales.

Crown Security Systems designs, builds, installs, and maintains intruder alarms, fire alarms, CCTV, access control to current British and European Standards.

Crown Security Systems was established in 1982 as a specialist electronic security installation and maintenance company. Crown Security Systems approach is to provide a total security solution utilising the latest technological innovations, engineering excellence and above all listening to what the customer wants. The products range from intruder alarms, CCTV, access control, number plate recognition, and other electronic security products.

Croxley Alarm Systems specialise in the specification, installation and maintenance of a range of security and protection products including: domestic and industrial burglar alarms, CCTV, locks, security lights, access control, and covert CCTV.

Cryptocard is an industry innovator in authentication-as-a-service, bringing organisations the cost reduction, simplicity, and flexibility that can only come from SaaS. New business efficiencies, infrastructure scale, and cost savings are being driven by virtualisation and cloud services adoption, but this changing paradigm has challenged organisations to make the move to the cloud securely and smoothly, without disruption to their business.

Cryptomathic is a provider of security software solutions to businesses across a wide range of industry sectors, including banking, government, technology manufacturing, cloud and mobile. With 30 years' experience, they provide systems for eBanking, PKI, ID & ePassport, card issuing, advanced key management and managed cryptography, through best-of-breed security solutions and services.

cryptovision is a leading supplier of innovative cryptography & public key infrastructure (PKI) products. The lean and intelligent design of the complete product range makes it possible to integrate the most modern cryptography and PKI application into any IT system. All products are continually provided with the most state-of-the-art cryptographic algorithms. More than 30 million people worldwide make use of cryptovision technology.

CSG Fire & Security has been established over many years to meet the ever-growing demand for installations of fire alarms, CCTV, access control systems, intruder alarms and also gate and barrier systems.

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.

CTC advanced is a full-service provider in the qualification and approval of products, including market access, regulatory qualification as well as certifications for private schemes. One branch in which CTC advanced has evolved to a major partner is the payment industry. Providing debug and type approval testing for many payment schemes including EMVCo, Mastercard, Visa and furthermore in related areas such as NFC,RFID, e-Identification etc.

Cumbrian Systems looks after fire and security needs of clients ranging from domestic, commercial and industrial sites including Ministry of Defence & government contracts. The company installs fire alarm, fire suppression systems, CCTV, and access control systems.

Custodian Total Security Services supplies and installs intruder alarms, CCTV, and access control systems. It is a local independent company based in the North East of England with an area ranging from Alnwick across to Hexham and South to Durham, Cleveland and North Yorkshire serving both the domestic and commercial markets. the company also provides a full 24-hour emergency service to all customers.

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.

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

Cyelcor Ltd offers solutions such as CCTV, Intruder Alarms, Security Smoke Systems, Fire Alarms, Access Control, Video Door Entry Systems, Smart Home Automation, Oil & Gas Telemetry, Systems, Automated Swimming Pool Dosing. The company also provides consultancy services for home and business owners.

Cygate is a Swedish IT company with strength and flexibility. They are part of Telia and on Sweden's largest network they can offer locally produced and tailored IT services with both breadth and edge to help realise ideas.

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

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.

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.