"They used familiar tactics to trap 4,000 people into streets outside the Bank of England in a practice known as "kettling", tightening the cordon when violence flared in one part of Threadneedle Street and a group of protesters, whose faces were covered, broke into the Royal Bank of Scotland."
link to article
Friday, April 3, 2009
Protests Leading up to G20
April 1st, 2009: The Guardian provides video footage and anecdotes from the G20 protests in London: