Found this article, I know most probably already are familiar but for those who don't it's quite interesting
https://www.hellomagazine.com/film/862047/last-of-the-summer-wine-where-are-surviving-cast/
If like me you like the old programmes from the North of England you’ll enjoy this Facebook group, they have done great clips on it.
M62 Films A Northern Collective.
https://www.facebook.com/share/v/1B4bmQ7Bp4/?mibextid=wwXIfr
It amazes me how they managed to inflate the castle, which destroyed Wesley's tin shed, yet managed to avoid the sharp bits of tin without damaging the castle.