Special Purpose Electronics Ltd. has the expertise to provide a large range of systems including intruder warning systems with monitoring facilities, access control, door entry systems, closed circuit television (CCTV), security management systems and perimeter fence alarms. The company offers full range of services to both commercial and domestic applications.

Specialist Alarm Services Limited specialises in providing electronic solutions to security and convenience concerns in health care industries around the world. The company has designed, manufactured and installed Nurse Call and Staff Attack Systems at sensible prices for nearly 25 years. Its current customer base includes international and UK private sector clients as well as a host of NHS Trusts and Government Agencies.

Established in 1993 Spectre is a market leading independent provider of electronic security solutions. Typical projects include schools, colleges & leisure sites to large industrial and retail developments locally and nationally. The company's solutions include integrated management systems CCTV access control security grilles electric gates electronic barriers perimeter sences foggers asset tracking personal attack systems.

Spetsnaz Security International Limited provides professional close protection, bodyguard services, executive protection, and tailored security solutions for private clients, corporate clients, VIPs, and high-profile individuals. Established in 2016, the company provides professional CCTV camera installation, rental systems, 24/7 monitoring.

Being in the business for over 27 years, Spy Alarms Ltd has been installing security systems in the South East. The company has more than 17,500 customers – both domestic and commercial – throughout London, Kent and the Home Counties. Certified by the security industry governing body NSI to Gold Installer Standard, Spy Alarms consistently gains the Metropolitan Police ‘Alarm Performance Award’ (Gold).

SSE Renewables is a major developer and operator of renewable energy generation, headquartered in the UK and Ireland, with a growing presence internationally. They are committed to delivering the green energy the world needs now and in the future. Part of the SSE plc group, they have an operational portfolio of around 4GW of onshore wind, offshore wind and hydro generation, with a secured future project pipeline of over 15GW in development

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.

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.

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.