The New School Rooms is a fab property, we went with 10, 4 adults and 6 children. The big dining/living room is a stunning room (the whole building is listed). The kids loved the pool table, and the dining table was a great size comfortably seating us all. I also loved the fact that there were big pans and loads of cutlery and crockery for a big group.
The facilities in the house were great, and any problems we had the owner was quick to deal with. The pool is unheated and wet suits definitely meant that the kids all got a lot more time in the water than they would have had otherwise. It's on the bus route to Bath, and a great location to explore the area from.