Hundreds of demonstrators have staged a roadblock outside The Royal Courts of Justice in opposition to the Government's proposed changes to legal aid.
Supporters of anti-cuts direct action group UK Uncut gathered on the Strand in central London at around midday.
Many of them sat on the road and others put their bicycles in the way of traffic.
They held placards which read: "Justice for all, not just the rich".
City of London Police warned the group that they were stopping the emergency services from travelling around the capital.
The demonstration was one of several roadblocks planned in towns and cities across the UK, including Manchester, Liverpool, Cambridge, Hull, Northampton and Norwich.
The protesters in London held a mock trial for Justice Secretary Chris Grayling, and attached a banner to the fence of the court building which warned: "No justice, no peace".
A number of police officers were at the scene but they were not attempting to force the group to clear the road.