The Federal Aviation Administration (FAA) is expanding efforts to source technology that can detect small, unmanned aerial vehicles near airports.

Three British companies developed the Anti-UAV Defense System (Auds), due to be included in new trials.

It works by jamming signals to drones, making them unresponsive.

A thermal imaging camera allows the Auds operator to target the unwanted drone before signal jamming, via a high-powered radio signal, is activated.