Horrible Histories by pure chance

While on vacation in England last September, we visited RAF Duxford, a WWII airbase and museum (posted elsewhere in my blog).
At the time they were filming some kind of movie. I took a couple of pictures and had no idea what they were filming.
By pure chance, I stumbled upon "Horrible Histories, Series 4 Ep1 Part3" in YouTube and lo and behold, I recognized the face of one of the actors in it. I went back to check and indeed, it is what that was! Amazing coincidence!