AE stated that Jeremy claimed he was on the phone for 11 minutes.
What exactly did AE claim? What was shown previously didn't include this claim.
Which log has West written 03:42?
Pc West wrote (see his log on this forum) "Fathers phone Mal. 860209 checked by GPO @ 0342 & left off hook" and his statement of 13 September 1985 clarifies that after Jeremy's call ended, Pc West informed Acting Inspector Targrass of the situation (but doesn't say how he did that) and immediately afterwards dialled Maldon 860209 [the WHF number at the time]. The line was engaged, so he asked the GPO operator to check the line. He timed her reply at 3:42, and she said the telephone had been left off the hook. Thus 03:42 should have been shortly after Jeremy's call ended, not 6 minutes after it ended.
As the time on Pc West's log came to be disputed, the police could have asked Targrass when Pc West spoke to him, but it seems they didn't do that.
. . . calling Julie prior to the police - something he denies . . .
Presumably, he doesn't now deny calling Julie prior to calling the police.