At the risk of disappearing down the Rabbit Hole, I crew in 1.5hrs beforehand for a route task at Lyneham because the aircraft invariably hasn't been loaded or refuelled.... I crew in for a Brize PTS task about 30 mins before because I know MT will take at least 20 mins to turn up. Anyway, this is all irrelevant to the thread title.
Back on the subject, I understand it's now up to a years delay for the sim move? JAMPAs at Brize for planning then hop on the bus for an hour or so. Some wag suggested the briefs could be conducted on the bus to save time! These folk are geniuses!