Campaigners have won a landmark legal challenge against the Government over UK arms sales to Saudi Arabia.
Campaign Against Arms Trade (CAAT) argued that the decision to continue to license military equipment for export to the Gulf state, which is leading a coalition of forces in the Yemeni conflict, was unlawful.
The group said export licences should not have been granted as there was a clear risk that the arms might be used in a serious violation of international humanitarian law.
Giving judgment in London on Thursday, the Court of Appeal ruled that “the process of decision-making by the Government was wrong in law in one significant respect”.
Announcing the court’s decision, Master of the Rolls Sir Terence Etherton, sitting with Lord Justice Irwin and Lord Justice Singh, said the Government “made no concluded assessments of whether the Saudi-led coalition had committed violations of international humanitarian law in the past, during the Yemen conflict, and made no attempt to do so”.
Sir Terence added: “The decision of the court today does not mean that licences to export arms to Saudi Arabia must immediately be suspended.”
He said the Government “must reconsider the matter” and estimate any future risks in light of their conclusions about the past.
A Downing Street spokeswoman said the Government was "disappointed" with the judgment and was seeking permission to appeal.
Labour leader Jeremy Corbyn has called on the Government to stop selling arms to Saudi Arabia immediately.
"The UK Government should accept today's court ruling that arms sales to Saudi Arabia are unlawful because of their use against civilians in Yemen," Mr Corbyn tweeted.
"UK advice, assistance and arms supplies to Saudi's war in Yemen is a moral stain on our country. Arms sales to Saudi must stop now."