Seems to vary not only from type to type but crew to crew. Some will keep a more than respectable distance and cause grief on the taxiways while others are happy to stuff their aeroplane right up the backside of the one in front. No hard and fast rules until they are airborne !!!!!!! as long as they dont do a manchester, everybody is happy !!
really should be out at a party now, not on here. sad git.
happy new year.