No, no, no! There was no sneaking past NB. NB told JB over the phone SC had the gun and was going crazy/berserk. At this point NB had no idea whether or not the .22 was loaded let alone whether or not SC would fire a shot. NB had a very low opinion of the local police and family privacy was paramount hence he called JB. Much the same way Freddie called NB when SC became disturbed on a previous occasion. As NB was on the phone to JB he heard gunshots ring out dropped the phone and run to the bedroom, where he was shot 4 times before retreating to the kitchen where he collapsed in the chair and was easily overpowered
Yes, yes, yes! The first reaction of any father whose daughter was going berserk with his firearm would be to disarm her asap, especially if he knew that she had never used it before. This was a newish Anschutz 525, relatively low-powered for dispatching a human with just a couple of bullets unless accurately directed at the heart or brain. What would stop him taking a chance to disarm Sheila before she had a chance to fire off any misplaced or wayward shots at him? Absolutely nothing, imo. He was very familiar with firearms and their properties, bigger and stronger, no doubt capable of completely flattening Sheila if necessary! The haloperidol made sure she was dozy and slow enough to be overpowered.
And I can't accept that just because it was reported that Nevill had a low opinion of the local plod he had to call Jeremy instead of 999 in such a dire life or death situation. When the police were taking witness statements at the cottage a few hours after the murders, wasn't it Jeremy who according to Colin Caffell, said that it sounded as if his father had already been injured, i.e. shot in the mouth and therefore rendered incapable of speaking clearly, if at all. (see Vanezis)
What I do find odd though is how on earth he came to be straddled and precariously balanced across that chair back with his pyjama pants wrapped around his ankles, and head in the coal scuttle. Very strange position to be in, as if he was deliberately lifted there by the killer... impossible for a lightweight like Sheila to have done so, and without that person getting blood on their clothing at the same time, imo.