Thanks for all the replies everyone
The reason I'm keen to get the medical done is because I'm slightly hard of hearing (wear a hearing aid, but not industrial sized!) and I want to be sure i'll pass before spending any money on flight training. I'm 25 years of age so everything else should be alright (I hope) but it's just that issue I want to resolve.
I actually wanted to be an airline pilot, but upon sending my audiogram to the CAA they advised that my hearing wasn't of sufficient standard to meet the tougher Class 1 medical, and they wouldn't allow for correction by hearing aid.
Regarding Finances, I'm expecting to fork out around £5-6k for a PPL from beginning to end, would you say that's reasonable?