@ Crusader
It's the actual nitty gritty of what-happened-when that I struggle with on this.
During that last morning, CV comes into work and finds time during the handover stocktake to call SJL's bank and report finding her stuff; we don't know when.
The bank then phones SJL; again, we don't know when.
SJL calls the pub and arranges to collect her stuff, then fills in a duff appointment in her desk diary. We don't know exactly when this call occurred, other than that (obviously) it was after the two previous. It was perhaps as late as 12.40, right before she actually left. It was probably no earlier than whenever she realised the head honcho was around , meaning if she weren't around, her diary needed to show a reason why not. So she made this call between 11.30 maybe, to 12.40.
So the only time she had an opportunity to organise another meeting was after setting up the visit to the PoW, whenever she did, and before setting out. Otherwise, she could not have known she would be there in order to say so to anyone else.
Assuming she did, and that conversation passed unnoticed in the office, she could perhaps have had an existing meeting set up. She then calls that contact to say she'll be going via the pub first. But she apparently fails to show, and later, that contact, "Sarah", calls the pub to ask where is she. This is a workable sequence - but of course it says that "Sarah" had nothing to do with the abduction. If she had, she would know whether SJL was at the pub or not.
The above works to put an explanation on the woman's call, but not the one from a man claiming to be plod.
