Campaigners and lawyers have warned that the Court of Appeal's ruling finding the ban on Palestine Action to be lawful has further blurred the lines of an already broad definition of terrorism, and that is has “dangerous” implications for the right to protest.

On Monday, a five-strong panel of judges rejected a high court’s ruling quashing the ban.

In a ruling in February, the High Court found the ban to be unlawful on three grounds:

Firstly that then-Home Secretary Yvette Cooper had breached her own policy in deciding to proscribe.

Secondly that the proscription risked a chilling effect on individuals' rights to freedom of speech and assembly.