Why on earth should it be any more problematical than doing all training on the Jey Provost which is what the RAF did for a while some years back? I'm sure BEagle can give us chapter and verse.
As far as I know, the only piston aircraft the RAF use, BBMF excepted, are the Tutors and Fireflies and they don't service them. If it weren't for the development of diesel engines, it wouldn't be too many years before you would see turbines in civvie trainers.
Mike W