"this might be a daft question..but anyway..can jockeys hear the racecourse commentary during the race?..so if the commentator said it was a steady pace they would know to move nearer to it etc?"
I was wondering about that a few weeks ago, EC. I thought the noise of them galloping would probably muffle any audio around the stands, especially when they're on the far side. Don't know though, as I've never even ridden a horse, never mind being in a group of them, so not sure how noisy it is in there.
Maybe when the commentator keeps mentioning a steady pace, he's backed a hold up performer.