In pictures: UK's anti-war protests

People from across the United Kingdom and Ireland have been out in their thousands to support a day of anti-war marches. More than half a million people converged on London, while other cities, including Dublin and Glasgow, hosted their own demonstrations.

About 25,000 people rallied outside the Labour party conference in Glasgow

Anti-war demonstrators included Bob Crow, general secretary of the RMT and writer Tariq Ali

Muslim women joined a multi-cultural throng of protesters

Anti-war protesters dressed as Tony Blair and George Bush march down London's Whitehall

The message on banners was plain and simple

About 100,000 protesters gathered in Dublin

It took hours for marchers to make their way to a rally at London's Hyde Park