Just as a post-script: if Nevill phoning Bamber was integral to the plan so Nevill had to be up and about, and people who believe Bamber is guilty reckon he hid the phone downstairs necessitating Nevill to rush down to the kitchen to get to the phone, all Bamber would have needed to do was plug the bedroom phone back in by the bed and put the 'hidden' phone into the kitchen socket after everyone was dead. As he's busy staging Sheila's body with a gun with her fingerprint on it, and he has allegedly been planning this for months, I'd have thought he would have staged Nevill's body with a telephone next to it, off the hook, gripped by his bloodied hand if it was part of his alibi.
This is one of the main problems I have with this: if Bamber cold bloodedly planned this for weeks - and the prosecution does rely on lots of pre-planning with a bicycle, wetsuit, gloves, phones etc - he would unequivocally have shot his father first. He used the gun and was a good shot: he will have known it would not necessarily kill his father, his greatest adversary. And if his alibi hung on his father phoning him, he would have left his father melodramatically clutching a phone.
Like all Jeremy supporters you simply make up what you choose to believe and say the hell with the facts and evidence. You decided he would shoot his father first no matter what even though that would give away for sure he lied about receiving a call from his father. He told Julie prior to the murders he planned to say he received a distress call. That means it was not some ad hoc thing he actually planned it out.
It doesn't matter if there is a phone in the bedroom or not if Nevill was killed in bed then he couldn't make a distress call to Jeremy. People who died in their sleep don't make distress calls. It would not be credible that his father got back into bed after calling Jeremy would it? He needed to shoot his father as he was sitting on the bed or rising from it in order to stick a phone near him and people to believe his father called.
The 4 shots fired at his father failed to immobilize him. The gun was empty and Jeremy needed more ammo. In all likelihood he ran to the kitchen with Nevill chasing him so that Nevill could try to prevent him from reloading and caught up with him in the kitchen. It seems less likely that Nevill managed to fight his way past him and exited to run to the kitchen to get a shotgun or other weapon.
They had the struggle in the kitchen and Nevill was knocked out hen Jeremy was able to reload and fired 4 more shots killing his father. Why would he stick the bedroom phone back? He took that phone away so that they could not summon help before he killed them. If they heard him entering and summoned help he would be screwed.
Since Nevill made it downstairs he decided to present to take the kitchen phone off the hook and gave the suggestion that Nevill was attacked while he was on the phone with Jeremy thus disconnecting the call and then he fought his killer before being shot dead. DCI Jones fell for this nonsense but the shell casings in the bedroom as well as the bullet that grazed Nevill being found there tell us the attach started in the master bedroom. The killer fired the full magazine into June and Nevill in the bedroom and the gun was empty and the fight happened to try to prevent Jeremy from reloading.
Why do you think the 4 shots int he bedroom was to Nevill's left profile? Either he was sitting on the bed or getting up hence his left profile was facing the shooter. Indeed the trajectory of the shot to his shoulder and face were down trajectories. The only way for that to be the case would be if Nevill was not upright fully when shot in these locations or the killer was standing on a chair or stool which is not at all likely.