1GS Security Services provides a wide range of security services across the capital, the UK and around the world. With over 40 years' combined experience provides a range security services to a wide variety of clients in both the public and private sectors. 1GS Security Services include manned guarding, retail security, door supervision, corporate security, CCTV & alarm, among others.

4Front Security Ltd offers security services and CCTV installation throughout Nottingham and the UK as well as a range of other wireless security systems.

With nearly two decades of highly rated service, AOS is one of the leading security companies in the UK. AOS recently achieved a score of 163 following the Security Industry Authority ACS audit, which places AOS in the top 1% of companies in the Approved Contractor Scheme for the second year running.

Acctiv8 supply the most flexible & reliable wireless burglar alarm security and safety system on the market. Acctiv8 Wireless Burglar alarms are unique because they not only protect your valuables from intruders but also act as a remotely monitored safety system.

Ad Hoc Property Management offers property security solutions to European market leaders. The company protects vacant properties using the Property Guardian model, ensuring such properties are not left to become derelict. Ad Hoc offers solutions for threats such as squatting and asset stripping through socially responsible property protection.

AD Porta are a dedicated railway security specialist. They are currently providing security to major rail projects in the London area as well as trackside security during upgrade and enabling works.

Advanced Guarding Services provide security guarding services for all industries in Kings Lynn, Norfolk as well as across the UK. The company's primary mission is to offer reliable and compliant security services to all areas of industry. A professional organisation, sympathetic to the limitations of our clients businesses and with 100% focus on customer service at every level within the company.

Andrews International (AI) was founded in Los Angeles in 1988 in response to the growing demand among Hollywood studios for security forces with advanced skills and training. The security company operates offices throughout the United States, Canada, and Central America. AI security officers are protecting life and property at national landmarks, major tourist attractions, industrial sites, and educational and financial institutions.

Arfeen Security Ltd is an SIA approved Security Company based in Derby (East Midland) providing Manned Guarding, Locking & unlocking, Key Holding, and Mobile patrol services.

ARM Secure is the resulting completely independent, security solutions company of a merger between two sister companies belonging to the Asset Protection Group. The companies, Alarm Response and Keyholding (ARK), and VRC Monitoring Solutions provided separate security solutions to commercial and residential properties across the United Kingdom. By bringing the two companies together .

BDi encompasses the three group companies, BDi CCTV Limited, BDi Contract Services Limited and BDi Commercial Services Limited.The Company provides high quality security to their clients, whether it is CCTV installation, maintenance or monitoring, access control, security guarding services, event management or trespass management. They provide site services in gritting, maintenance and electrical.

Better Security Guarding Ltd provide sia trained and licensed security guards and professional security services throughout the united kingdom.

Bluegrain Ltd is a Manchester based security service provider, offering everything from manned security personnel, to 24h CCTV monitoring services. They have been providing a pro-active, professional mobile rapid alarm response service to its client base for over 25 years, operating 24 hours a day and 365 days a year. They focus on providing a complete residential and business security service.

Boxer Integrated Security Systems Ltd deal in the following areas CCTV, Intruder & Fire Alarms Keyholding, Door Supervisors and Manned Guarding.

Broadstone Security offers bespoke security services to clients who require everything from discreet close/executive protection to covert long-term surveillance operations. The company’s unique internal ties to the police, military and government agencies provide it with the knowledge-base and scope to provide cost-effective protection across the globe.

BusinessWatch aims to help businesses, to improve security and prevent crime, by working with them to identify the problems and provide solutions.