Get a breakdown of exactly what you are getting - an additional £1500 sounds a heck of a lot.
Either way, make sure you spend some time in the area where you will do your CPL training. Get to know the local area, landmarks, local ATC procedures etc. You'll be well ahead off the game when you start your xc. Get up to Brecon, over to Kemble, Newbury and down to Yeovil, Dunkeswell.