Source: www.thetimes.co.uk/article/islamic-state-drone-warfare-scuppered-by-british-zappers-blighter-surveillance-systems-mskpf2lvc# (Paywall)

American troops in Syria and Iraq have helped to destroy more than 500 Islamic State drones using a British-made £1.5 million device.

The zapper, developed by a consortium of three small companies, scans unmanned aerial vehicles (UAVs) from up to six miles away, locks on to their position and jams the signals that are controlling them. It can tackle swarms of drones at once if necessary.

Each drone is either forced to the ground or suspended in the air until it runs out of power.

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