I wrote a song about this event entitled "The 1971 Folk Music Festival Blues" It was one of entries in the 2010 Lincolnshire Folk Song Comp. It didn't win but I was happy to make the final. It's on my (blatant commercial plug coming up) new CD "Songs For Folk To Sing
but in the true spirit of Christmas you can hear it for free at www.reverbnation.com/strumminstevejackson

I tried to list as many of the performers as I could in the song but I'm usually reminded at a gig that I've missed someone out!