I just found a blog with the description. Is there a special free speech limit around the Parliament(except for those limits that are nationwide)?
Yep, they did it to get rid of this guy who was protesting against the Iraq for for 4 years. http://www.parliament-square.org.uk/ http://news.bbc.co.uk/1/hi/magazine/4619942.stm It's a bit rich since farmers are still technically allowed to graze cattle in Parliament square