Find me this video & you can have my babies!

OK, here's the thing. I was watching The Old Grey Whistle Test here in the UK when I was about 15, so we're talking probably mid 70's. Soft Machine did a session with a woman on violin and the bass player that absolutely blew my mind. He played a really fast impressive riff all the way through the tune & I still remember it to this day. I don't think it was their usual bassist, (Hugh Hopper) it *may* have been Jack Bruce, I'm not sure.

Is anyone out there old enough to remember this, who was the bassist and more importantly, can you find me the video?
Pleeeeez?

Thanks
Russell (Sorry you can't really have my babies becuase I had my strings cut)