I think what they were saying is that the Grace Spit is the only 2 seater flying with a WW2 pedigree...there are a couple of others knocking about, I think.
It made interesting viewing...Brendan is always good for a bit of theatre, and these reality shows certainly go big on that. Couldn't watch as those two got chopped though. Having been chopped and selected at a later date, I know which I prefer...
Shame they don't get a chance to land it, but it makes perfect sense for them not to when you consider the costs involved. Not flown a Spitfire myself but have a few hundred hours on taidraggers of the Stampe/Pitts/Harvard variety, and have heard it said that takeoff and landing in an S2b is not unlike an early Spit, in terms of acceleration and visibility. If that's the case, I'm not surprised they lost so many on the ground way back in the days.