Found a clip I’ve wanted to see again for the last few years. Mike Oldfield recorded the Blue Peter theme tune in 1979 and I remember the footage of Simon Groom (one of the BP presenters) going to visit him to oversee the recording process.
It’s a great little clip and illustrates the whole multi-track recording process very well to the layman. The video is (unfortunately) in Real Video format, so it requires Real Player.
See the clip at http://www.bbc.co.uk/mediaselector/check/newtalent/musicmakers/mike_oldfield?size=4×3&bgc=C0C0C0&nbram=1&bbram=1.