Roger Waters, the former Pink Floyd songwriter, is facing calls to be prosecuted after he declared his support for the banned terrorist organisation Palestine Action.

Twenty-nine people have been arrested in London after police said they were responding to a protest in support of the banned group Palestine Action. The Metropolitan Police said those arrested were being held on suspicion of offences under the Terrorism Act 2000 and had been taken into custody.

More than 20 people have been arrested during a protest in London in support of Palestine Action, a group which has been banned under UK anti-terrorism laws.