liam548,
I am in a similar boat, I have just started my NPPL though. Once I have had LASEK (and stablised) i'll be converting that to a PPL. I have worked out it'll cost me about £5500 (Then £2k for the LASEK). I think it depends on many variables, such at how quickly you learn and were you're flying!
I am also interested of the financial path thereafter; hour building costs,Night rating etc, IR, CPL then the APTL (including exam cost etc.) As i've got at least a year until I obtain my PPL I don't doubt, especially in the current economic climate, costs will vary - the path may even alter...
Why am I doing this?!!!!!!!
All the best