As a result of the rising need for security products, Lazer Beam Security was formed in 1996 with the objective of supplying, installing and supporting electronic security solutions that are effective and reliable. Since the founding of Lazer Beam Security, they have been serving the security needs of both the domestic and commercial markets. Lazer Beam Security is a recognized ISO 9002 installation company.

Lee Security London Ltd have been keeping businesses and homes safe from fire, theft and intrusion by installing fire alarms, CCTV, access control systems, security gates, integrated security, and fibre optics etc. The company is experienced to make sure fire alarm system is effective, compliant and professionally installed, without breaking the bank. Based in London, Lee Security provides the most suitable specification for its clients needs.

Leigh Visual designs, installs and maintains electronic security systems, particularly larger CCTV and Access Control systems for public sector and commercial customers. The company seek to understand a customer's business and their security issues and will recommend the most cost effective solution. Leigh Visual expertise in large access control systems and IP CCTV as well as covering traditional CCTV, perimeter, intruder and fire systems.

Lifeline Alarm Systems Ltd specialises in the design, installation and maintenance of Electronic Fire & Security Systems for domestic, residential, private sector, and heritage sites. The company haven gained NACOSS for Intruder Alarm Systems and maintained high levels of achievement in these approvals ever since. Lifeline Alarm strive hard to provide leading edge technology to all its clients.

Limitless Security specialize in security systems, fire alarm systems and man guarding services for business premises and homes. The company provides reputable, qualified security personnel for all purposes, from event staff and stewards to door security and personal protection. Limitless Security also offers professional intruder alarm system installations and maintenance contracts for both homes and businesses.

Lincoln Security has expanded to become one of the UK's most respected security solution providers. The company protects some of the most critical national infrastructure sites in the UK with its security systems including access control, CCTV, alarms systems, and key cutting services etc. Located on the Lincoln’s high street, Lincoln Security offer selection of products to installation and long-term maintenance.

Link CCTV Systems now design, install and maintain premium integrated security systems for some of Europe’s biggest corporations and groups on over 450 sites nationally. Link currently maintain a range of systems from large schools and universities to government and corporate offices, retail parks, haulage depots and high-profile shopping centres

LINX - London Internet Exchange Ltd. focus on investing our service and membership fees into strengthening all LINX network services. This ensures that their infrastructure is as up to date as possible and that they remain at the forefront of the IXP industry. By doing so, they can confidently provide our members with improved network performance, low latency and more control.

Littlewood Fencing Ltd is one of the most diverse fencing contractors in the United Kingdom. They provide gate automation solutions, access control solutions, CCTV systems, safety devices and many more.

Locksmiths in Liverpool; Lock and Key Master Ltd are the source for Locksmithing, High Security Locks, Master Key Systems, Electronic Locking Systems, Access Control, Home Security, Ingress/Egress Controlled Solutions, CCTV, Intercom and Electrical Installations. The company offers tomorrows security for both the domestic and commercial sectors today. LKM is accredited by The Master Locksmith Association.

LogiScan Security Systems Ltd provide a complete service to its clients, from the design and consultation stage, planning and installation of security products intruder alarms, fire alarms, access control systems, perimeter detection systems etc. The company aims to provide powerful safety and security solutions and the very highest levels of service. LogiScan are a NSI NACOSS Gold Approved Company.

London East Security Centre Ltd is installer and distributor of safes, locks, padlocks, CCTv etc.

Longcross Security Ltd provides security installations, maintenance, and design that allow for maximum flexibility enabling to integrate CCTV with other security systems such as access control, intruder alarms, fire alarms, EAS tagging and ANPR systems. The company is NSI (NACOSS) Gold accredited. Based in Surrey, Longcross Security is dedicated to identifying and undertaking activities which go above and beyond compliance.

Longmore Electronics provides supply, design and installs security systems including CCTV, access control, intruder alarms etc. The company provides both domestic and commercial security solutions. Longmore Electronics also offer 24 hour call outs for emergencies and cover most of Northern Ireland.

UK's Lyrico Systems design, install, commission, maintain, and monitor CCTV, fire alarms, access, intruder alarms, and intercom systems for wide range of clients including local authorities, shopping centers, schools, hospitals, and commercial businesses. Lyrico's network of engineers are based across the UK to offer a nationwide coverage and are dedicated to delivering exceptional customer service.