This phrase has now featured against two meetings, recorded by the RM in their 'Timeline' as having taken place. The first was chaired by a member of the CFHT and the second by a member of the BBP (on zoom I understand). If both were indeed run in the manner described by that phrase, I would have expected some progress to have been achieved. Surely the aim of holding a 'without prejudice' meeting is to allow those involved to get matters resolved. An alternative possiblity is that using WP can keep dicussions out of the public domain.