 In 2014–15, these 10 ambulance services spent £57.6 million on 333,329 callouts of private or voluntary services – an increase of 156% since 2010–11.This use of private contractors for frontline services has been politically controversial, although 56% of the British public believe that greater private sector involvement will help maintain or improve standards in the NHS.In 2013, the Care Quality Commission found 97% of private ambulance services to be providing good care.