The Welsh charity, Wales Air Ambulance, operates three H145s for helicopter emergency medical services (HEMS) in Wales, plus an H135 for Childrens Wales Air Ambulance, making them the largest H145 operator in the UK. Operating out of bases in Caernarfon, Llanelli, Welshpool and Cardiff, they cover 8,000 sq miles (20,700 km2) of remote countryside, mountain ranges, cities, and coastline in aid of a...