The holding-loop radio is an audio device which uses GPS and Internet access technology to relay spoken flight communications from aircraft in the area. At busy times individual air traffic conversations cannot be heard above a general chatter but in the early morning, when most long-haul flights arrive, communications are easier to hear. The radio ideally sits within the roofless concrete chamber in the motorway home, a place where you can watch the circling planes in the airports’ holding loops before coming in to land.