HAWKWIND - Quark Strangeness and Charm (1977) on Marc ITV kids music show introduced by Bolan.
Bolan died days after the final episode of Marc was filmed.
Robert Calvert was singing live over the audio track. Apparently Bolan and Dave Brock didn't get along hence Brock skipping this appearance.
If I remember correctly Quarks are sub atomic particles which are measured in terms of qualities called 'strangeness' and 'charm'. Robert Calvert was a clever sod.
there is so little video footage of classic Hawkwind so this is special.