The site that Top Gear uses is operated as an event location by a company (other than the BBC).
http://www.dunsfoldpark.com/media-events.html
http://wikimapia.org/#lat=51.1160238...2&z=15&l=0&m=b
There's a 'doctored' B747 that was used for a (Bond?) film. Casino Royale, I believe.
http://www.flightglobal.com/assets/g...x?ItemID=13467
It has unusual engines fitted in place of the usual ones.