The Great Western Air Ambulance Charity (GWAAC) is a charity air ambulance service in South West England. It operates for the relief of sickness and injury, with a specialist paramedic in critical care and a critical care doctor, providing response by helicopter or car between the hours of 7:00 am and 1:00 am, 365 days a year. The service covers Bristol, North Somerset, Bath and North East Somerset, South Gloucestershire, Gloucestershire, and surrounding areas.