Personally I'm appalled at how little qualifications nannies need having just jumped through several hoops to become a childminder.
I'm an ex primary teacher with 3 dc of my own and have had to do a 1st aid course, 2 courses on becoming a childminder,an enhanced CRB check,an OFSTED inspection and a health check signed by my GP.
Nannies on the other hand need to do none of that which I think is a pretty poor state of affairs. Children should come first and relying on parents to ensure all the above checks are carried out are not in the childs best interest.Not all parents will necessarily do it, know how to or will simply rely on agencies who say they've done their own checks.
Can't get my head round it just seems ludicrous.