Supporters of the far-right English Defence League (EDL) marched on Downing Street today in a protest sparked by the killing of a British soldier outside his barracks in Woolwich on Wednesday.
EDL demonstrators and counter-demonstrators from the Unite Against Fascism (UAF) movement exchanged angry chants and, later, glass bottles and other missiles.
Police said three people were arrested during the protests.
This video report is by ITV News London reporter Ria Chatterjee:
More top news
Speaking to ITV News' Mark Austin on the anniversary of the London bombings, ex-PM says nations around the world will need to respond.
A Canadian man has been arrested after tying more than 100 balloons to a garden chair and flying over the city of Calgary.
A van bearing the faces of some of Britain's most wanted fugitives will be driven around parts of Spain popular with expats in a new push.