Hey Willie,
As a mom who has a daughter who has done semester studies in other countries and having visited England and Wales myself, I wouldn't hesitate a second sending my daughter there. However, like anywhere, there will always be dangers. Doesn't matter if it's overseas or here at home. If you're like me, you'll worry about them no matter where they are. Ummm, is this the same girl who went careening down the snow slope toward trees and river? If that didn't scare the heck out of you, then you've got no worries. :)
Ang