Young Mr Grace has kindly pointed me in the direction of his superb blog One for the Dads which revives the great dance routines of Pan's People and Legs & Co from Top of the Pops, the UK's top pop muscic TV show. His latest post is one of Legs & Co (1976-1981) transforming from white coated scientists into classic fur bikini cavegirls whilst dancing to Cerrone's Supernature; so that puts it in 1977.
Utter genius!
You've all done very well!
