As I understand it the aircraft started (she was right in front of us) and was on-target to meet her slot, which had already been brought forward. Unfortunately the hyd problem became apparent and she was forced to shut down.
The problem was resolved but the weather by this time had worsened (it was marginal earlier anyway) and there was no way she could display, so they therefore towed her over to the static line-up.
Not sure there is any great conspiracy here...........