Senator Security Services Ltd: Established 1997; a leading provider of integrated security for the Facilities Management sector. Manned guarding, key holding, alarm response, mobile patrols, front-of-house, CCTV remote monitoring and car park management for shopping centres, void and occupied property, business premises and NHS / healthcare facilities.

Sentinel Systems supply, install and service a range of vehicle safety solutions, including reversing radar, CCTV and award-winning cyclist protection systems ranging from RCVs and tippers to vans and buses.

Shield Asset Security Ltd is a long standing and trusted security guard hire and security services company. With many years experience in the industry Shield is your first choice for all of your security needs.

Shoreditch Security provides professional SIA-licensed security services across London and the Home Counties. They specialise in event security, door supervision, crowd management, manned guarding, mobile patrols, keyholding and alarm response, close protection, and corporate security.

Show and Event Security has over five decades of experience in successfully planning and delivering a diverse portfolio of events. It also meets relevant SIA and BSIA codes of practice for event leisure requirements, with due regard to all relevant codes of practice and guidelines relating to sporting and stadium events.

Sight & Sound provides high quality and reliable security services throughout London, Kent, Essex, East & West Sussex and Hampshire. The company provides manned guarding, key holding & alarm response, remote monitoring services, etc. for factories, offices, retail, schools, construction sites, councils, hospitals and libraries, as well as other industries and businesses. Sight & Sound is a SIA Approved Contractor.

Smart Grid Forums Ltd. are an independent conference production company serving the smart grid technical community. They monitor the market, conduct depth interviews with technical decision makers, and translate this into techno-commercial conferences that empower participants to accelerate their implementation plans and deliver exceptional results to their organisations.

Sodexo Ltd develops, manages and delivers a diverse range of services, designed to improve the quality of life for clients and customers. Based in London, the company's service includes security and grounds maintenance for its clients in offices, schools, prisons, hospitals, military bases, remote sites and hospitality events. Sodexo is the only company to integrate a complete offer of innovative services, based on over 100 professions.

Based in the heart of Surrey, Southern Fire & Security Ltd are a newly established security installation company. They have extensive knowledge base of all aspects of the security industry covering alarm systems, fire alarms, CCTV, access control, door entry systems and manned security, offering quality and professional services.

Southern Monitoring Services Ltd is an independent Alarm Receiving Centre and Remote Video Response Centre in the UK and has achieved the first NSI Quality Assurance ISO 9002 certificate. The company offers services such as security system monitoring, remote video monitoring, out-of-hours service co-ordination, lone worker monitoring, fire alarm monitoring, facilities & bespoke monitoring, as well as assisted living & telecare monitoring.

Sovereign-SIS was estalished in 2009 bringing together leading operatives in the field of security, intelligence and investigations, in order to provide a truly comprehensive professionl service to meet the needs of customers.

Spartan 24 Hour Security provide security operatives for a wide range of clients in the North West, UK and Worldwide. Security operatives have the ability to use their own initiative and solve problems that sometimes arise. Spartan 24 Hour Security started trading in 2009 and have an expanding customer base due to our high standard of service.

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.

SPS Security is a privately owned security and support services company that provides coverage primarily throughout the North of England. The company has established a reputation for excellence, value and customer care and in April 2006 achieved accreditation as an SIA Approved contractor of security services.

‘SQR group’ is one of the leading companies in the Global market providing a broad spectrum of security solutions, consultation services and the implementation of security plans based on thorough risk assessments and threat evaluations. Security, Quality and Reliability are the foundations of the company and they are what distinguishes ‘SQR group’ from other companies in the UK market in particular, and the Global market as a whole.

StadiumTM is a UK based company that provides traffic management, stewarding, security and training services to national and international events. StadiumTM specialises in protecting crowded spaces with the aid of hostile vehicle mitigation barriers. The company also offers training and facility management solutions.

Stamford Security Services Limited is a security manned guarding service provider company covering Bracknell and allover United Kingdom. The company entered the security market with the intention of gaining a strong position through their extensive knowledge and quality services. They take great satisfaction from meeting the requirements of their clients, which has allowed them to ensure the continual growth of the company.

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.

Established in the security sector in 1998, Stone Management Group is a facilities management provider supplying Security, Cleaning and Maintenance services to a range of businesses. An approved SIA contractor, the company has built up a strong reputation in the North West of England for the high level of service they offer their client base.

Stone Security Services operates using a 'ground-up' based approach, as security is not a one size fits all operation. Undertaking a full pre-risk assessment allows both Stone and the client to plan the necessary steps in fulfilling the individual security requirement.

StrongGuard Security UK is an accredited, multi-faceted and award-winning national security and risk management provider, specialising in Manned Guarding, Monitoring & Response and Risk Services & Consultancy.

SRI is made up of individuals who possess the ability to remember 80% of the faces they have ever seen and it’s thought that only 1-2% of the population share this trait. SRI’s personnel come from a diverse range of backgrounds, including ex-law enforcement, military and more, and they use these talents to review CCTV footage to aid in both private and police investigations.

Swift & Safe Security ltd is a security services company based in Greater London and Middlesex covering every angle of needed security services that are required by the public or private sectors. Swift & Safe Security provides security for communities, special events, businesses, parties, private functions, parking, warehouses and shopping centres in London and Middlesex areas.

SWL Security Services is a security service provider with extensive experience of working with home office and the police on various assignments. The company offers manned guarding, retail security, CCTV installation and monitoring services. SWL also offer alarm response and key holding services for businesses.

T.S.S (Total Security Services) is a family owned business, established in 1989 and the largest privately owned security provider in the United Kingdom. They supply a wide range of security services to a diverse portfolio of sites - large and small - taking pride in delivering high levels of service to the corporate, retail and public sector organisations.