I agree that VP was probably told to hunt him round for the first circuit and if she felt OK to make a go of it second time round. She looked tired coming up the hill, like she didn't have the strength to push the horse on. Not a criticism as such, the only thing that'll get you fit to ride in a race is lots of riding in races! With another year under her belt, and an equally obliging partner, she could have a real shot.
All credit to her though, I've ridden since I was 10, though not for the last few years, (and non-racers only) and you wouldn't catch me having a crack at anything like that!