Thank you for the links Myster. I've read a lot of your discussions when doing google searches prior to joining, but can never find them again now I've joined the forum.
As Holly points out though, the blood group on the socks indicates it was June's blood not Nevills - and I think the least likely scenario is that JB would shoot June before Nevill. I think if Bamber did it either he would dispatch the twins first as the morally most horrific (so easier whilst asleep) or Nevill as his greatest adversary who might thwart him, or Sheila because she needed one clean shot without a fight. It seems to me that in the bedroom June was shot before Nevill, and was shot so badly that if Nevill had been present he would have, at the very least, thrown his body over hers: I don't think he would have left her incapacitated with the murderer undoubtedly going to finish her off whilst he was trying to escape to the phone.