Funny. So if you were born, say, sometime in the early to mid 70s in the UK you probably remember Rainbow, right? I reckon some of this clip (’bout 2MB) has been dubbed, has to be, but it takes me back! Via my Dad who probably remembers sitting through it with me :o)
[Advisory: Enormous 'ooo er' 'fnar fnar' and 'guk guk' potential (if anybody remembers Finbar Saunders as well)]
Very funny James!! A more detailed explanation of this clip appears here:
It seems that it was made at the time by the crew as a joke but never aired!!