She does look like a little cracker but £200 for a hour.....that's nearly as much as I'd charge in my real life!!!
I can't understand why a newbie wouldn't start off a bit lower, maybe in the £140 region, get some great feedback and then start to up the price. That to me makes much more commercial sense.
I've seens Sienna at £200 an hour and her pricing structure is interesting in that 90 mins is £240 which then seems reasonably good value considering the basic hourly rate. But then in the cold light of reality that's £240 which is a lot of money.
Looks great but a tad expensive. Good luck to the girl though, I'm sure she'll do well mainly due to the lack of competition. Bring back the old days when Sophie et al were £100 an hour and this young lady would look significantly overpriced.