A law firm that tried to remove Hamas from the UK’s list of proscribed terrorist groups has closed down in its current form after being investigated by the Solicitors Regulation Authority.

Riverway Law will now reopen as the legal arm of a new organisation called “Riverway to the Sea”, which describes itself as “dedicated to understanding and confronting the racist ideology of Zionism”.

The firm’s title is a reference to the pro-Palestinian slogan “from the River to the Sea, Palestine shall be free”.

The slogan has been interpreted in a variety of ways. Critics claim it rejects Israel’s right to exist by asserting a Palestinian territorial claim to all land between the Jordan and the Mediterranean. Others characterise it as a call for the international recognition of a Palestinian state alongside Israel.

The new firm states that its purpose is to use the British legal system to challenge Israel, whose name they render in quote marks, and Zionism “through strategic litigation, legal education, and international co-ordination”.

It cites asylum claims, employment tribunals and defamation suits as opportunities to further these goals.