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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Clacton MP Douglas Carswell admits that he feared for his safety when he was mobbed group of anti-austerity protesters outside Westminster.
This evening's showers will ease and then it will be a fine start to the weekend before rain arrives on Sunday.
New Peterborough United boss Dave Robertson has been talking to ITV News Anglia about his plans for his first full season in charge.