The High Court has turned down a bid from an ex-Iraqi general to prosecute former Prime Minister Tony Blair over the Iraq War.
Abdul Wahed Shannan Al Rabbat alleged Blair committed "the crime of aggression" with his 2003 invasion of Iraq, but no crime by that name exists in England and Wales.
Lord chief justice, Lord Thomas of Cwmgiedd, and senior judge, Mr Justice Ouseley, said in their judgement that there was "no prospect" of the case succeeding.
The court said the crime of aggression had recently been brought into international law, but that it would not apply to past events. Parliament must decide whether the law will be incorporated into UK law, the judges said.
The general wanted to prosecute Blair, the former foreign secretary Jack Straw, and former attorney general Lord Goldsmith.
Al Rabbat sought a judicial review on his case after Westminster Magistrates' Court blocked his attempt to bring a private prosecution. Al Rabbat was looking to have the case heard by the Supreme Court, and hoped the court would overturn a 2006 ruling by the House of Lords, which said there was no crime of aggression in England and Wales.