So,as far as West is probably concerned,the two calls were merged into one to make sure a Vicious killer was sent rightly sent down.
The call was hidden by fiddling the times Snow.
Bews and Myall's statements left at 3.45
But the Myall note has 3.37 (while JB on line talking to West!)
Ca7 arrives at 3.50 according the West and 3.48 according to MB 's log (impossible if left at 3.45)
According to Bonnet Ca7 left at 3.35 which cannot be due to JB's call if on line to West at 3.37
Then there is the log itself! West would have said something like:
"Hello PC 1990 West here, I have a Mr Bamber on the phone from 9 Head Street, Goldhanger"
West creates two statements one stating 3.26 and the other 3.36 when asked at trial who asked him to write the statement stating 3.26 he can't remember!