I'd be interested to hear what rating you're given 4get, just as a benchmark. I’d question the credentials of anyone carrying out these inspections anyway! I’d rather take advice from an accredited RICS source. These HIPS just entail some herbert who has paid a few hundred quid to go on a training course & get a certificate then come round your house with a clipboard, look at what boiler you’ve got, whether you’ve got double glazing, if your roof is lagged then use some algorithm to work out a spurious energy rating!
Good luck with the move.