I genuinely don't know anyone in "real life" who cares about Jeremy Bamber. They might have heard of him, if they're 50ish, but they don't have the remotest interest in supporting him because he is so blatantly guilty. The idea that Ralph called Bamber is ridiculous. He was either in a position to take the gun from Sheila, or he was too badly injured.
The sad fact is, many murderers have supporters. Huntley does, Bridger does, Philpott's son supports his dad. Even Brady had a supportive website.
Obviously there is zero chance that Nevill would ever choose to call Bamber at 3.00am.
There is then zero chance Nevill would wait several minutes for Bamber to wake, realise the phone is ringing, decide to answer it, then go downstairs.
There is zero chance Bamber would have turned his answering machine off when arriving home.
There is zero chance Nevill would say 8-11 words in 2/4 seconds when Bamber eventually answered. Then put the phone down & take it back off the hook.