It'll take as long to fly as it does, I should advise signing up for the full PPL, you'll probably need the full hours to pass the skill test anyhow, unless you are particularly young and sharp - which most of us are not.
I've never flown with the flying school, but every experience I've ever had of Halfpenny Green / Wolverhampton has been entirely positive as a visiting pilot. I should start there.
G