As cable theft continues to affect rail networks, energy infrastructure, construction sites, utilities, and vacant commercial properties, First Response Group (FRG) has introduced FRG Tremors, a seismic detection system designed to monitor tampering of both installed cable and cable drums in storage, while tracking stolen materials in real time. The system gives operators instant visibility over critical infrastructure and enables immediate response.
Exclusive to FRG in the UK, FRG Tremors uses seismic sensors to detect vibration, tilt, and movement around cabling and associated infrastructure. When interference is identified, an encrypted signal is sent to FRG’s 24-hour control centre, which alerts response teams and police. If cable is removed, onboard GPS with jamming detection allows stolen material to be tracked until recovery by law enforcement.
Each unit operates independently on a long-life battery for up to three years and is designed for deployment in remote or exposed locations where traditional CCTV and motion sensors are less effective. Suitable sites include rail lines, renewable-energy installations, material storage compounds, and vacant commercial properties.
During trials across six operational facilities, including rail feeder lines and signalling cable routes, the system recorded zero theft incidents. Sensors performed reliably in high winds, rainfall, and varied terrain, with no false alarms reported during 60 consecutive days of live testing.
The launch of FRG Tremors coincides with industry warnings regarding rising metal theft. According to the Energy Networks Association, the crime continues to cause millions of pounds in losses annually, affecting public safety and power continuity. British Transport Police have reported increasing theft along rail corridors, causing signalling delays and service disruptions. The Office for National Statistics recorded a 42% increase in “theft of metal” offences between 2022 and 2024.
James Reed, head of construction and infrastructure at First Response Group, said:
“Cable theft has become one of the most damaging and costly crimes facing UK infrastructure. FRG Tremors changes the model from passive surveillance to active response – we can identify an attempted theft in seconds, deploy canine or mobile units, and prevent the damage before it occurs. For operators already battling inflation and budget pressure, the cost of prevention is now far lower than the cost of recovery.”
Reed added:
“We’re seeing an increasing need for systems that work where cameras and security officers cannot. That means battery autonomy, secure data transmission, GPS accuracy and rapid integration with live-response networks. FRG Tremors brings all of that into one deployable solution.”
FRG Tremors is integrated into FRG’s broader national network, connecting with its digital platform for alarm response and providing a unified view of threat detection, escalation, and incident closure. The system can also be combined with additional security layers, including mobile perimeter intruder detection (M-PIDS), CCTV, and access control.
FRG plans to roll out Tremors across the UK, prioritizing utilities, rail, energy infrastructure, and large property portfolios with vacant assets. Early interest has been noted from renewable energy and data-centre operators seeking protection for remote installations. The system’s cost-efficiency and scalability make it suitable for both short-term and permanent deployments.