I have a new toy for the weekend.   managed too borrow a FLIR camera to check the walls and roof for areas of cold before i plasterboard   Although it was not that cold last night i ran it over the whole of the inside surface looking for cold spots.   Good news is that there aren't any and as i suspected (the guy who did our pumped insulation for MBC was spot on and very fussy )   The cold spots are where i suspected plus a few that i can address.