<P> The Great North Air Ambulance Service (GNAAS) is an English charity based in the United Kingdom . It provides air ambulance services across the North of England, including North Yorkshire, the North - East, Cumbria and Scottish borders . </P> <P> GNAAS currently operates three helicopters from its two bases at Langwathby (near Penrith) and Durham Tees Valley Airport . All three aircraft were introduced into service during 2010 and 2011 are owned by the charity, previous aircraft being leased . The three helicopters are Eurocopter Dauphin AS 365 N2s G - NHAA, G - NHAB and G - NHAC . G - NHAC acts as a back - up helicopter, working from either of the two bases as and when required . All helicopters have full IFR capability, so are not as limited by poor weather and can fly outside daylight hours, but due to limited funding they do not operate in darkness . </P>

Where is the great north air ambulance based