On the day that the British Parliament resumed after its Summer recess, a large group of anti-war protesters marched into the Square. They were joined by people who demand the basic freedom to be able to protest peacefully without prior police permission or conditions. The video shows some of the confrontations with authorities, while no doubt Members of Parliament looked on from the windows of their well protected building.
Video:
http://www.archive.org/details/swc8-10-07
Details of the encampment which was started by Brian Haw on 2nd June 2001:
http://www.parliament-square.org.uk/
Details of SOCPA enforcement:
http://www.indymedia.org.uk/en/actions/2006/socpa/