If I remember correctly, Jeremy was specifically asked about Jeremy having received an alleged telephone call from Nevill on the morning of 7th August 1985.
At that time and in the immediate aftermath Jeremy was asked why Nevill had telephoned Jeremy as opposed to Nevill deciding to telephone the Police. I beleive, Jeremy's reply / explanation was that Nevill, as a private man, would have wanted Sheila's troubles to be kept only within the family and thus not get any of the authorities involved.
As such, Jeremy initially did not believe Nevill would have allegedly called the Police. This was not a part of Jeremy's initial version of alleged events.
Since then, apart from Jeremy being charged and hence challenged on his version of events (subsequently convicted of 5 murders) what else may have helped change Jeremy's mind/ reasoning?