There will be a festival to raise funds for, and awareness of Amnesty International in many venues around Cambridge from the 10th to the 30th of May. Includes a big busk in the city centre on the 13th - Dave Crow Barr and many others will be standing up and singing for the oppressed, tortured, prisoners of conscience and victims of corrupt regimes (are there any other kinds?) worldwide. Check out this link for details:

 http://www.amnestycambridge.org.uk/biggig.php