Police arrested 13 people after Palestine Action activists launched a protest in Norwich on Saturday. A crowd of 100 people waved Palestine flags and held up placards that read “Stop the genocide in Gaza” and “Free Palestine” outside City Hall shortly after 1pm.

The proscription of Palestine Action – banning membership or support for the organisation on the ground that the home secretary believes it is “concerned in terrorism” – has led to hundreds of arrests, two legal challenges and many questions about the state of protest rights in the UK.

British police said they arrested 365 people in central London as supporters of a recently banned pro-Palestinian group intentionally flouted the law as part of their effort to force the government to reconsider the ban.