Kent has a beautiful coastline, ideal for surfing and sailing.
Kent is home to many wealthy families who may work in London but choose to live in the countryside, where they can afford a bigger house and live more comfortable.
There is a good train network with direct trains to central London, in many cases it takes less than 1 hour to London.

http://www.kenttourism.co.uk/

And this is the link to Canterbury University, as Canterbury is a very attractive city for your people.
http://www.kent.ac.uk/ 

http://de.wikipedia.org/wiki/Kent

Many people in Kent own horses!
By the way, if any of your candidates enjoy horse riding, I often have families looking for an au pair who enjoys riding. Many people in this area own horses!