On the subject of re-rides
Back in the good old days, I was allowed to do re-rides when quiet. It been in the last decade or two that this was stopped for the big rides. The explanation given for not allowing re-rides, that is to give our body time to rest due to the G forces. Whether this was a genuine H&S requirement or just to boost the queue lines to sell fast track.
I remember a number of times in the past with the last ride of the day on the rollercoaster, being sent around twice before letting us off.
Before the Flume was shut down for good (not that long ago), if there were no one or not many people waiting in the queue for the flume or rapids, they would always ask if you wanted a re-ride or if you ask nicely they usually allow you to stay on the boat to the call of "One Boat"
Chessington world of Adventures would always allow re-rides on quiet days.