an observation . Even if JB had been accurate with his times and not waivered at all, the police were "allowed" to make mistakes , as were Julie and her flatmates - it would not have made a blind bit of difference . Because it would be his word against theirs. And as it appears to me the phone timings were all over the place, the police account - despite station clocks that were wrong and accounts being written down wrong would probably have prevailed.
as none of us KNOW who was telling the truth its a bit pointless arguing about it really.
The main question would be if EP and JM and her friends were persuaded to change the times of the call then why would that be - what would it achieve.
Its a bit like the Witham Question - its JB against EP - Why would JB deny it id it happened?
If it did not happen why did EP want it to be recorded that someone made a call to Witham?