Police have arrested 466 people in central London on Saturday for protesting the British government’s decision to ban the pro-Palestinian activist group Palestine Action under anti-terrorism laws.

The majority of those arrested during the demonstration in Parliament Square on Saturday were aged over 50, according to the Metropolitan Police.

The number of people arrested for supporting banned group Palestine Action at a protest in central London has risen to more than 520. Only 18 of those people remained in custody on Sunday afternoon but were expected to be released on bail “in the coming hours”, the Metropolitan Police said.