I'm now wondering if there's something in what Caroline said earlier. I've said that Nevill was shot in the bedroom, and that's because of the empty cartridges in there. However, perhaps he was shot on the landing with the shooter standing in the bedroom. It could be that he heard the shots which were aimed at June and came upstairs. Isn't that more likely than him rushing past Jeremy when he knew his wife had been shot next to him in bed?