On 24 September 2019, the Supreme Court of the United Kingdom ruled unanimously that Prime Minister Boris Johnson's prorogation of parliament was unlawful overturning the High Court's judgment, given by the Lord Chief Justice, in the government's favour. On the same day, leaked minutes of a conference call between cabinet ministers, including Cox, which took place after the prorogation had been approved by the Queen, detailed that Cox briefly told the cabinet at that time that in his view the prorogation was lawful and constitutional and that any accusations of unlawfulness "were motivated by political considerations". On 25 September 2019, Thomas-Symonds, facing Cox in the House of Commons, said that the Government "stands in shame" given what was "the most damning judicial indictment of a Government in modern times".
