This may seem like a good offer from your gang you must take into account:
-the price of the courses, which do vary hugely. An expensive place may give you a 'discount', off their advertised price, but you might still be paying much more than at a cheaper school which would not offer a discount.
-think- why would they offer a discount unless you give up something which would save them money? What could that be? Sharing beds? Do you order 3 pints and expect a discount?!
-you may get a 'discount' but then be milked for extra hours, ratings etc.
I suggest you consult Pilot and Flyer and then ask anywhere which you are considering for a WRITTEN quote, for exactly what you would receive for their £x course but I am sure you will find that anywhere offering y% off £z may be much more than £x.
If you are considering a JAA PPL abroad, which is often cheaper and much easier, especially in Autumn and Winter, some schools run an exchange rate racket. (the price £z is based on a rip-off rate and you have to pay them in Euros or Dollars).