Moneysaving expert is a great resource
I work with one every day, and he's not too bad... My old man has been in the FS industry since he left the mob in 87
He's at a client's house now, and won't be home until midnight, but could get him to give you a call over the weekend if you want some questions answered.
We have a substantial deposit, our basic problem seems to be the mortgage 'stress test' is a bit harsh on the multiples we're getting offered - I've sent you a PM Marky; it might be that he can give some advice that you could relay back by PM as well but the detail is in the PM.