Originally founded in Bristol, UK, SECURIST began with an experienced team of individuals with a wide range of backgrounds from within the security industry. Over the course of their time as one of the leading security companies and establishments, they have built up a large client base with many contracts specializing in manned guarding and event security at the very core of their operations in the South West.

Security Group is a privately-owned company, based in Bristol and working across south-west of England, specializing in intruder and fire alarm systems that is registered with the Security Systems and Alarms Inspection Board (SSAIB).

Seren Fire & Security Solutions supply, install and maintain fire and security solutions, primarily in the South Wales area, including access control, gate and barrier automation, CCTV systems, intruder alarms, emergency lighting, fire systems, fire extinguishers and safety signage.

Serv Security specialize in the consultancy, design, supply, installation, commission, service, maintenance and technical support of technology based Security Solutions. The company offer full Fire, Security and IT Package throughout the UK. Serv Security supports smaller commercial and domestic clientele, to growing its capabilities to also encompass support for larger clients with specific needs and requirements.

SGS Baseefa a certification body for electrical and mechanical equipment intended for installation and use in potentially explosive atmospheres. The company is accredited by the United Kingdom Accreditation Service (UKAS).

SGW Security Consulting has been providing independent security risk management and security engineering consultancy services. Based in Edwinstowe, the company's team of independent multi-disciplined Consulting Engineers, Fire Safety Engineers and Security Consultants, CCTV Consultants and Project Managers, specializing in securing the Built Environment. SGW recommend security measures that address risk, protecting people, property, and assets.

Sigma Engineered Solutions Ltd is a provider of fire & security systems such as access control, door entry, CCTV, intruder alarms & fire alarms. The company serves both domestic & commercial markets. Sigma Engineered Solutions Ltd installs and provides maintenance of burglar alarms & monitoring, photo ID system, fire alarm system as well as building management system.

Silico envisions a world where every decision is simulated, prior to being made in the real world. Silico is the leading provider of process simulation software, working with enterprises from any sector to transform their decision-making in as little as four weeks. The Silico platform is an end-to-end solution that enables businesses to create digital twins of any business or process quickly and easily.

Simpli Security is a UK based online retailer offering a huge range of security products including intruder alarm systems, CCTV cameras, money counters, safes, convex mirrors, traffic mirrors, metal sheds, storage sheds, bike storage, safety mirrors, barriers, car park barriers, bollards, bike racks, crowd/ queue control and much more.

SleepTight Security specialises in installing, fault finding, commissioning and servicing electronic security system, including intruder and burglar alarms, CCTV, electric gates, fire alarm systems, access control.

Smart Security Services Ltd is an SSAIB-approved company for the Design, Installation & Maintenance of both Intruder & CCTV Systems.

Sonic Security offers integrated security systems, access control, CCTV surveillance, as well as fire & intruder alarm systems. Sonic Security's access control and vehicle barrier entry systems allow the free flow of authorized people, while also denying entry to unwanted visitors. It also designs and installs camera surveillance with Remote Video Receiving Center (RVRC) facilities to meet requirements for loss & risk management control.

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 Center and Remote Video Response Center 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.

SPARC Fire & Security was set up in 2013 to primarily design, install, and service fire and security systems. The company soon gained a reputation in the field of fire detection and security, for the quality workmanship in diverse applications in industry and commerce. With staff having experience of over 30 years in these disciplines, SPARC Fire & Security’s staff have been involved with the design, installation servicing of fire detection.

Established in 2013, the company has grown to be one of the best-known and respected independent specialist fire and security providers working with and for a wide range of commercial, industrial, hospitality, private, public, and residential customers and has quickly earned a reputation for delivering tailored solutions for clients along with first class service.

Springhead Sprinklers have been professionally designing, installing, and maintaining fire protection solutions for over 20 years, from small domestic installations through to complex residential properties.

Sprinktec is an Independent Fire Protection Consultancy Service that can Offer benefits to both Consultants, Main Contractors and Sprinkler contractors,

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.

Strings Security Limited is a buyer's guide offering products and services to the Security Industry. The company provide information on companies who provide the products and services its clients need ranging from Access Control Systems to X-Ray Screening and everything inbetween. Based in Europe and Middle East, Strings Security enables quick and easy search for suppliers, products and services for the Security Industry.

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.

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.

Syncro Fire & Security provides bespoke fire and security solutions to commercial and industrial businesses throughout the UK; and is a highly respected name within the fire protection and security industry.

Double Check Security Group Ltd t/ T Class UK provides one of the best security services nationwide. They offer an extensive range of security services from Manned Guarding to CCTV Monitoring & Access Control.

Tatry Group provides Cleaning and Security services to help organizations create a productive and welcoming environment. They currently have more than 120 front-line staff and a highly experienced management team with in-depth knowledge of the cleaning and security service industries.

Tavcom Training provides online and classroom based security systems training courses. The company's courses include CCTV installation, design and maintenance, Intruder Alarm installation, Access Control, Fire Alarms, IP Networking, and Electro Technical. Based in Hampshire, Tavcom offers a comprehensive service for international clientele.