This Is being broadcast on 6music all of this week at 3am :O (thank God for BBCiplayer). It was made In 1974 and has some great interviews done by Bob Harris who seems to put everybody at ease, he has a pretty soothing voice . The first episode Is here:
http://www.bbc.co.uk/iplayer/episode/b01dxrkn/The_Live_Music_Hour_Anna_Calvi_The_Bamboos_and_Orange_Juice./ I think 6music got mixed up due to the clocks moving forward, so the documentary Is only titled wrongly, enjoy.