To the Manor Born 2007 Christmas special (spoilers)

Has anybody else watched this? I discovered the series through a combination of PBS and dvds. This was pretty funny. Audrey hasn’t changed at all over the years (& the rector still looks the same as he did 25 yrs ago). I know the exterior shots are of a real estate, but were the interior scenes filmed on location too or on a sound stage? Either way they did a good job reacreating the look of the series. By the way, how can Adam be both a fforbes-Hamilton and yet only releated to Audrey by marriage? :confused: Wasn’t Marton Audrey’s cousin as well as her husband?

Boy, that really is dredging stuff up from the past. What was the premise? Was there a plot, or was it just an excuse to show parts of old episodes?