This, I suggest is because 'PC West' is lying!!!
Not only is 'PC West lying, but he has opened himself up, to being manipulated by somebody in the CPS, who prepared a witness statement for him, backdated, to the 9th August, 1985, to say that the timing of Jeremy's call to Chelmsford police station was at 9.26am!
If I am wrong, then produce the hand written version of the same witness statement, dated, 9th August, 1985, bearing 'PC West's ' signature!!!