Established in 1992, State Digital Security Ltd. installs security alarms in the home and security systems for business premises. The company is headquartered in Cranleigh, Surrey and its services cover London, the Home Counties and the South of England.

Status Alarms Limited is a fully approved NSI GOLD MEMBER for intruder alarms, closed circuit television and door access control installations. The company has installed and maintained all types of security from a single circuit garden shed to residential homes, public buildings, schools, colleges, universities, police stations, fire stations, hotels, leisure complexes, museums and art galleries. Status Alarms has over 7,500 clients locally.

Incorporated in 2001, Status Security Systems specialise in the design, installation and maintenance of all aspects of electronic security equipment in the domestic, commercial and industrial markets.

Established for over twenty years, the Steadfast Group Ltd is a leading provider of security systems and services throughout County Durham, North East England. The company has expertise across a diverse range of industry sectors and provide both security systems and services from manned guarding and mobile patrols to CCTV installations and remote monitoring.

Steatite is a market leader in design, development and supply of rugged and industrial computers, custom lithium battery solutions and secure communication systems for mission critical and harsh operating environments. Steatite provides solutions for Defence and Security, Down-hole Applications, Emergency Services, Oceanographic, Vehicle Embedded Systems, Industrial Automation, CCTV and Security, Tracking and Telemetry.

Steatite Wordsworth, formerly known as Wordsworth and before that, Wordsworth Technology, is one of the UK’s largest providers of industrial rack mount computer systems, networking and I/O products. Established in 1985, Wordsworth has over 25 years’ experience in the design and manufacture of industrial systems.

STEMMER IMAGING is one of Europe's largest imaging technology provider with head office in Germany. STEMMER's product range includes various lighting technologies, high quality lenses for general purpose, wide range of area scan and line scan cameras, extensive selection of tested analogue & digital cables & plug-in connectors for any interface, softwares & large range of accessories such as housings, mounting brackets etc.

Stewart Intruder Alarms Ltd offers security products like CCTV with solid after sales support in Belfast. The company provides a wide range of security services and equipment in Belfast. Security services include a variety of jobs ranging from personnel services, equipment and devices, along with the planning and deployment necessary to make them effective.

STM Security Group (UK) Ltd is a UK based security company and an experienced supplier of manned security solutions and customer service staff, fully supported by leading edge technology. STM is a prominent supplier in the provision of security services with a wide range of customers in different industries. The company specialises in manned guarding, control room, mobile response, CCTV, SIA Security Guard training, etc.

Stocksigns Ltd is a supplier of health and safety signs. The company covers signage requirements of fire safety, quarries, water safety, first aid, traffic & highways. The wide services provided by Stocksigns Ltd. extend till MoD signage and local housing associations.

Founded in 1989, STOREX offers a range of external hard drives, multimedia, and recorders, receivers freeview recorders, portable video and audio, USB sticks and various accessories.

Stran Security Systems specialises in supplying and installing security systems for commercial and residential customers throughout Northern Ireland. From fire alarms and burglar alarms to CCTV surveillance and access control, Stran Security provides safety to its customers.

Sum Security an independent SSAIB Registered company based East Sussex providing installation, maintenance, repair and monitoring of high quality burglar alarms, CCTV systems, police monitored intruder alarms, access control and maintenance for home and business properties throughout the South East covering forest row, East Sussex, Kent, Surry and East Sussex.

Sunstone Systems are specialists in HD surveillance systems with significant expertise in Megapixel HD CCTV, IP Access Control and Wireless Technology. They have designed and installed a range of HD systems for large organisations, Independent schools, colleges and local authorities in the South East and throughout the UK.

STS is one of Europe’s and Africa's most successful CCTV, security equipment, work wear, mobile payment terminals distributors and installers. Originally UK based, they have grown in to a global company with branches and distributors throughout the world.

Sussex Alarms Limited is a privately owned company, established in 1981. Sussex Alarms installs and maintains burglar and fire alarms, CCTV and access control to commercial and domestic properties in Sussex and surrounding areas. The company achieved NACOSS (now National Security Inspectorate) approval in 1987.

SV Security Systems Ltd boasts more than 15 years establishment in the security systems marketplace. SV Security Systems offers a reliable service to the Midlands and North West regions. As an NSI NACOSS Gold Approved installer, the company provides the highest industry quality installations in accordance with the industry specific ISO 9001:2008 Quality Management System Standard.

SVD-FRANCE Specializes in business video surveillance, sound system, Congress, audiovisual systems, access control, intercom, video doorman. It brings together a team of specialists who can accompany customers in the study of their needs to the commissioning of their system via internal year after-sales service. Thesis skills enable to respond effectively and meet your expectations throughout the national territory.

Established in Tunbridge Wells in 1978, Swift Alarms Supplies Ltd. is one of the UK’s largest and most successful fire and security installation and maintenance organisations. The company provides a fully integrated, nationwide installation and maintenance service to its customers across the complete spectrum of fire and security products.

With its Security Services and Alarm and Security Systems business units, the Swiss Securitas Group offers an effective set of instruments with which to address security and protection needs through constant readiness, state-of-the-art technologies and professional services. Over 10,000 employees are at the service of the Swiss Securitas Group in Switzerland, Europe and elsewhere - dedicated to the field of security.

Sword Services was founded in 1990 by Lawrence Sword and has established itself as a major player in the field of industrial electronic security solutions and gained a reputation for exceptional service and delivery. The success of Sword Services can be put down to a number of factors, not least the tight-knit team of industry experts and technicians assembled within what remains a family-run business.

Developed in conjunction with recognised experts Symbiotics Ltd., provides a fully accredited CCTV Training Course for Investigators which engenders confidence. Advancements in investigation and forensic techniques have led to increased reliance on CCTV evidence. As leading specialists in Human Performance Symbiotics Ltd., was approached by the Home Office to design an accredited CCTV Training course for investigators.