When I first read DV, I couldn't actually fathom what he thought had happened at the pub, because the circumstances are so sketchy. She didn't go to 37SR, therefore she went to the pub and died there, apparently. However, from what's in his book, he doesn't know whether the pub was open, closed, busy, or dead; he doesn't know who else was there. It would be a bit odd if the brewery was happy to close at lunchtime and write off the takings just because the landlord was off on his holibobs. DV doesn't have an explanation for the 123SR or FPR sightings. He does suggest that this could have been some accident rather than deliberate, meaning CV does not need to be a predator, so that's a reach he's not quite making. But otherwise it's a bit flimsy.
Where DV is right is that it is lamentable there was no curiosity about the PoW at the time. They searched her flat where she wasn't supposed to be going, they searched 37SR where she was supposed to be going, they searched 123SR where she wasn't supposed to be going, AL presumably told them he'd been to the PoW with her on the Friday and she was supposed to be going there that very Monday. Yet nobody thought to search the PoW too, or verify that it was open (the till record would prove this), establish how busy it was, or put a notice inside and out asking if you were there that day and had you seen her. WTF not?!
If that had been done then it would have been clear in July 1986 whether she had been killed there and hidden. As things stand, she might have been, but only if a lot of now unverifiable facts drop into place.