Long John Baldry did a neat song about getting busted for Busking on Carnaby St. It's basically a rather humourous narrative about being arrested and going to court and having to explain "Boojie Woojie Music" to the judge. The end turns into a pretty hard rock tune though. I can't remember the title, but I believe it may be "Don't Try To Lay No Boogie Woogie On The King OF Rock And Roll"