ST Fire & Security offers a full range of professional fire & security services, to accommodate domestic and commercial properties, operating from Manea, March, in Cambridgeshire, United Kingdom.

Standard Security Services Ltd installs intruder Alarms and CCTV systems in the North East of England from the Scottish borders into Durham. Being a member of N.A.C.O.S.S., the company installs all alarms, from domestic household or commercial to the highest standards.

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 specialize 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.

Stega UK Limited provides managed cyber security services, securing enterprises and businesses against internal and external cyber-attack threats. They work to prevent bad things from happening to organizations, like data breaches and services disruptions, and protect the company's reputation and compliance posture.

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.

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.

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.

Stratiis is an accredited IT company specializing in the delivery of IT Managed Services across hardware, software and infrastructure.

StrongBox Security Systesms is an SSAIB accredited, insurance approved company who both supply and install monitored burglar alarm systems connected to a dedicated 24hr monitoring station. The company designs and installs bespoke security systems for both the modern home and business premises. Specializing in intruder alarms, CCTV, access control, active fire systems, gate automation and lock smithing.

Stroud Alarms Ltd is Gloucestershire’s provider in specialist fire, safety and security solutions for domestic or commercial concerns. The company offers access control, barriers and gates, CCTV, emergency lighting, fire alarms, fire extinguishers, lone worker devices, intruder alarm and monitoring services etc.

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 organizations, 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.

Surelock McGill manufactures and installs high performance door locking and bolting systems, as well as ancillary products. Their products are tested for resistance to many forms of threat such as fire, blast, ballistic attack. They provide a wide variety of custom locks, including single-point and multi-point locks, and locks for blast protection.

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.

SWI Security Concepts Ltd are a premier installer of Access Control in Leicestershire, Rutland and the surrounding areas. We cater for small to large businesses, and also domestic properties in the Midlands area. Specialists in the design, installation, maintenance & repair of Access Control Systems, Door Entry Intercoms, Automatic Gates & CCTV.

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 organizations. The company provides a fully integrated, nationwide installation and maintenance service to its customers across the complete spectrum of fire and security products.

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.