That's a different programme
Rosevidney but I saw it too. Must admit I didn't pick out the DH4s, but then my aircraft recognition is not on a par with yours
I think I might have picked out Townsend in an airman's SD cap though!
I never ceased to be amazed at the lengths some programmers will go to achieve authenticity in one area, and then throwing it away in another. Railways are a good example. If it has a chimney and goes puff puff it will do - never mind if it is 50 years out - after all, nobody will know!