Lawyers tell supreme court decision to proscribe organisation as terrorist group is attack on freedom of speech and protest

Palestine Action was banned as a terrorist group after using tactics similar to – or less extreme than – the suffragettes, the UK’s highest court has heard.

Huda Ammori, a co-founder of Palestine Action, is challenging last year’s decision to proscribe the direct action organisation, placing it alongside groups such as al-Qaida and Boko Haram.