Where do you get £100 an hour from!
I believe that's roughly what it costs per hour to hire an aeroplane!
I would suggest that the average/typical/median/modal PPL does not own/operate their own aircraft. I also read somewhere (but I can't find the reference) that a not insignificant number of pilots pretty much give up flying once they have their PPL; presumably these should also be factored in.
Cheers
Whirls