From the phone logs. we have two separate times 3:26 and 3:36. If Neville did not call the police. then police operators have made a mistake on the time this enables Jeremy to argue either way. Besides its another debate that's not going to prove anything. If Neville did call Jeremy I doubt he would have considered exactly what time it was when the call came only leaving him with a rough estimate to memory.

All in all it wont determine anything.
That West screwed up doesn't permit him to realistically argue either way. Changing his claims just hurts him with rational objective people.
1) He claimed he received the call from Nevill around 3:15
2) He called Julie around 3AM even before the time he claims he received Nevill's call so this is a problem but he got people to say maybe he called a little later (so a slight chance he could have called after he supposedly claimed he received the call from Nevill) but surely no later than 3:30.
3) He claimed he called Julie after he called police.
What does all this mean?
It means he needs to claim what he did at trial. His lawyers said the call to police came prior to 3:26 because 3:26 is when West called Bonnett and that he was off the phone with police prior to 3:30 so then able to call Julie. They said West recording his call at coming at 3:36 was an error. This is how they tried to make his lie of calling Julie after police seem possible. It also kept the gap between when he claimed to received the call from Nevill and time he called police to within 5-7 minutes. So though not immediate at least within a short amount to time.
Jeremy changing the time to 3:36 ends up causing a large gap between when he claimed to receive the call and finally called police. If he called at 3:36 no way in hell did he call Julie after phoning police. Nor would he have had enough time to get dressed and get in front of police so they could pass him on the way to WHF so it is all an obvious lie simply to try to pretend Nevill called.
The notion Nevill called before Jeremy is not credible at all because they would have told Jeremy and would not have asked Jeremy for the information they did (because they already would have gotten it from Nevill) nor would they have told police they were going because of a call from Jeremy had Nevill called. Nor would firearms officers have received a briefing saying police never had any contact with anyone in the house but Jeremy alleged he received a call from Nevill. They would have been told Nevill called had he actually done so. Thus Jeremy lies and puts himself in a bad position to pretend Nevill called though it is not in the least bit credible. Not very bright...