They've been credited with increasing the chances of surviving a serious injury by up to 20 percent.
But charities like the East Anglian Air Ambulance and Essex and Herts Air Ambulance receive no government funding, and rely entirely on donations to keep going.
Jonathan Wills and Elodie Harper spoke to Diana Jakubowska from the East Anglian Air Ambulance about how they manage to fund their work and keep flying.
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A cloudy night with outbreaks of rain pushing in. The rain will be heavy at times and the wind will strengthen.
Meet the finalists for the 2017 Pride of Britain Awards in the Anglia region.
Third of three special reports by ITV Anglia's Sports correspondent Donovan Blake looking at the changing nature of sport.