I tend to agree with Chris. The house is unremarkable and more LA than England. Now that it has been left derelict it is most likely not cost effective to restore it.
I recall when the York's first moved in, there was a photo spread in one of the Sunday magazines, most likely the Times on Sunday, as well as a "special" on TV, a la Jackie Kenndy's White House tour. It was dreadful. The place looked so out of place, inside as well as out. If I recall correctly it was a decorator from Texas that was responsible for the "creation" of the interiors- hence the "Dallas" connection.