I am sure that Lottery/Sports Council funding could be found, and training could be a coordinated systematic thing, which, by being accredited could be linked to parallel qualifications in careers, so people would put it on their CV.
While most people would not specifically want payment, most would be glad of it, and certainly I know my German friends simply found it too expensive this year. Where else do you have to pay out of your own pocket to provide a life saving service to others.