The integrity of the fresh water supply to London has been stepped up with an array of cameras, high security fencing, vibration sensors and razor wire.

The risk to the water supply forced the UK's largest water and waste company to further enhance the security along one side of the perimeter of reservoirs in south London, where a public footpath has provided easier access for trespassers and committed graffiti ‘vandals’ to enter.

The Zaun Group had already installed ArmaWeave and razor topping around the whole site, so Thames Water asked software security expert EyeLynx to design a solution based on its SharpView CCTV system to protect the site of Critical National Infrastructure.

Zaun Group companies EyeLynx and Binns installed two huge temporary CCTV masts with high performance PTZ cameras, thermal cameras with video analytics, horn speakers and high-powered WiFi to link the two with a SharpView Networked Video Recorder.

CPNI-approved PIDs were also fitted which, fully integrated with SharpView, provide the site with a triple layer of electronic security of the highest quality.

The system can provide alarms and CCTV video evidence so whenever a camera or vibration sensor detects a potential breach of the fence line, the horn speakers can broadcast audio warnings, send alarms to security personnel and capture video evidence for potential prosecutions.