What about Henley? There's a Hotel du Vin, plenty of opportunity for riverside strolls (or picnicking), lots of pretty villages, not too far from London.
It's owned by an association called Carr-Gomm who initiated formal eviction procedings a while ago. As far as I understand, there was a court hearing last week at which they got approval to evict the squatters but I don't know when this will happen. I think they're planning to redevelop the house in the next few months so hopefully it will be back to its former glory soon.