Assuming it’s the one in Northamptonshire, I did a run around there a couple of weeks ago. Surprisingly nice! The hotel (with filling breakfast) wasn’t Fawsley Hall perchance? I work for the company that owns it.
It was! A very nice 10th anniversary treat, it’s a great place. I have to say I could get used to coming back to a sauna and hot tub after a run in the drizzle...!