I saw the show..the Spit is Mk.21 LA198. The girl was Ariel Tweeto, of the Discovery Channel TV show "Flying Wild Alaska." She's working on her Private Ticket..but being a young kid, she didn't know what a Spitfire was, or even what war it fought in. When Ferguson asked if she thought she could fly it, she said, "well, if I can land my 152 I could probably land that..." Of course the funny thing is, during the war Spits were flown by kids much like her, often with even less training than she's had!
Ferguson knew the basics..it's a Spit, and they fought in the Battle of Britain, but that's about it.
Here's the Spit from the show:
http://www.glasgowlife.org.uk/museums/our-museums/kelvingrove/about-Kelvingrove/TheRestorationofKelvingroveArtGalleryandMuseum/SpitfireLA198/Pages/default.aspxSN