Hi Sam_Flying
As alway a difficult decsion to make.
It depends a little on the time scale. I took 14 months on the distance learning course using PPSC, whilst working full time and studying in the evening and weekends.
I then then went to the states to hours build. Followed that with the flying course at TG Aviation at Manston airport.
However the first course of action I took when I decided to go for the course was to get a class 1 medical at Gatwick. If I could not pass this (and at the age of 50 that was always a possibility) then the rest was a waste of time and money.
For me this system worked, as I managed to get through and am now a part time flying instructor. You can only go for what is right for you. (hope this helps)
Good Luck with the descion.