The G20 protests have passed off largely peacefully on Day 1. I didn't venture anywhere close and can only go by media accounts. Bank of England was swarmed with thousands of protesters who were restricted to a very small area by the police. Ultimately the protesters broke through the police cordon there, and there is a report that someone climbed up the wall of the building. Tear gas was used to disperse the crowd at one point.
The RBS building in the same area, though, was not so lucky. Some people took a fancy to its windows and broke the glass, entered in and trashed some equipment. You can see some of that in the below video.
The Guardian has good articles about the same: their LiveBlog
, an article
, and their G20 Homepage
To me the funny part is that most of the protesters think they are opposing capitalism.