I just wanted to say, that even though I play in an orchestra and 2 bands, there is no way I would even attempt this task.
Maybe because I know part of what's involved, is why I won't do this - Very occasionally at one of the bands the conductor gets delayed at work. This band I am the leader of, but no way am I going to conduct.
So good luck to them all!
Anyway, if you like these sorts of shows, live in Britain, or you like music ... or you want to know why those of us who play can learn to rely on the "guy with the while stick" - Tune in and watch.