Communications and Surveillance Systems Limited has for many years been the first port of call for Government departments, law enforcement agencies corporations and individuals with specific needs involving the use of high quality, high specification state of the art equipment Areas serviced: Central Londonwww.spymaster.co.uk3 Portman Sq, W1H 6LB

Maximise your capability with the world's most progressive and innovative electronic surveillance systems from Spy Shop Ltd. Gain total reach over any target or area and obtain admissible forensic evidence that will prove any deed or statement beyond doubt. Give yourself the edge: deploy guaranteed professional tools from a consultancy that has led the industry for over twenty years. Areas serviced: Central Londonwww.spyshop.ltd.ukMandeville Pl, W1U 3AT

Spycatcher of Knightsbridge is an old established name. The company is run by a management team with an enormous amount of experience in the fields of surveillance, counter-surveillance and personal protection. Our products are all specifically designed to provide an efficient solution to a specific problem. It may be that someone is vandalising your car - you may be losing stock from your warehouse or think one of your staff is setting up in competition with you. Perhaps you are worried that a competitor has placed a bug in your office. Areas serviced: Central Londonwww.spycatcheronline.co.uk3 Portman Sq, W1H 6LB

The objectives of S2G as a professional security guard company in London and UK, reflect the concerns we have with the environment we live and work in. As acts of theft, vandalism, fraud and terrorism continue to increase, so does the need for good security support services. S2G are a managed security support company with a team of highly qualified and experienced security guard personnel to hospitals, in London and UK. Our security personnel are trained to handle delicate situations, within hotels effectively minimising the chances of any unpleasant disputes. Areas serviced: Central Londonwww.s2g.co.uk29 Harley St, W1G 9QR

Bramah is London's oldest security company. Established at 124 Piccadilly, London in 1784, and today based in Marylebone, London and Romford, Essex, we manu- facture Bramah and Rola locks for domestic and commercial applications in the U.K. and overseas. We are Marylebone's foremost Locksmith and Burglar Alarm installer. Areas serviced: Central Londonwww.bramah.co.uk30-31 Oldbury Pl, W1U 5PT

Abbey Locks and Security is an established 24 hour police recognised Locksmith and Security company operating throughout London and the Home Counties. Our trained engineers can be on site within 1 hour of your call day or night. We employ a fully qualified skilled team of engineers throughout Greater London who can attend your premises and advice you on security and what will best suit your property. Areas serviced: Central Londonwww.london-locks.co.uk108 Baker St, W1U 6LJ