NHS has its own staff trained abroad in different countries and state-of-the-art technical equipment for detecting all kinds of audio listening and spy devices.
Trust one of the oldest companies in Spain in the field of Countermeasures. Be wary of "so-called professionals" who use flashy cheap equipment with lights and sounds acquired in spy shops, Ebay, Aliexpress or Amazon is throwing money.
Detection of all kind of hidden listening devices and eavesdropping gadgets.
Detection of listening microphone transmitters.
Location of GPS trackers, balizas GPS in cars
Detection of phone line tapping with eavesdropping devices