More than 20 people have been arrested on suspicion of terror offences after protesters gathered in central London to show support for the now proscribed group Palestine Action

The protest group was officially classified as a terrorist organisation from midnight on Saturday after the measure received overwhelming support from MPs and following the failure of a last-minute legal challenge to delay it.

Among those who appeared to be taken away was the Rev Sue Parfitt, 83, a retired priest from Bristol who was sitting in a camp chair with placards at her feet. Protesters also claimed Tim Crosland, a former government lawyer, was detained. He had earlier spoken of his intention to support the protest.