I went to Whittlebury Hall in Northamptonshire yesterday for an all day seminar. Looked very nice. Lovely setting and buildings. Has anyone stayed there or eaten in their restaurant before?

not stayed or eaten there, but did go to a spa day there last week.
the spa price included lunch (buffet - but very good I have to say) and use of facilities all day, including the "heat & ice" experience, which is fun - and they have a large hot tub type of thing, with about 6 different areas in it - all with a different set of jets - again, very nice !!
if you are after the opportunity to slouch around all day in slippers and dressing gown, this might be something you fancy
was a bit disappointed that when we went to book a facial at about 11.00am there were no slots left, so I guess we will have to go back again for the facial experience