Hundreds of thousands protested the Iraq war in 2003
The demonstration has been organised by the Stop the War Coalition, an organisation that was founded to oppose the US-led War on Terror. The message on the Coalition's webpage for the event reads:
"The war on terror is in danger of spreading once again, with continuing threats of increased intervention in Syria, the ongoing war in Mali and a possible attack on Iran. Join us to say Stop Western intervention in Syria, Western troops out of Mali, Stop the spread of war."
It is held on the 10 year anniversary of the mass demonstrations that took place around the world against the US and UK-led intervention in Iraq.
The rallies attracted hundreds of thousands of protesters to the streets of London, New York City and other major capitals around the world on February 15, 2003.