The area ymention is very large and includes London, major suburbs, big and small towns, villages and countryside. I think you are going to have to be a little more specific

.
The rental costs vary hugely too. For example a place in say a small town in Hampshire is going to be way cheaper than in Central London.
Are you going to be working? If so, where? I suggest you get a good UK map to get an idea of just how big and variable the area is.
Expat areas? You will find a bigger mix of nationalities in the larger towns and cities.
-