I'm suprised that no-one else has added the oft'quoted phrase of verbatim that you shouldn't spend more money than you have to before getting a class II medical certificate (assuming JAA PPL). a) because you don't want it to hold up going solo and b) becuase you don't want to be spending circa. £2000 on training and equipment without knowing if you can hold a license.
Good luck and enjoy your PPL!