Can't remember if this has ever been mentioned before but while watching The Prize I noticed something which I haven't done before. Amazing how you can watch these episodes many times and still new things appear!
Just after they start galloping in the race I notice what is probably Gillian's stunt double on Sirocco nearly crash into a fence which surrounds a tree.
I guess she was trying to keep her face out of camera shot by looking down and just didn't see it. Could have been nasty!