In the 1980s Pannick appeared for the Sunday Times in the Spycatcher case. He acted for the gay servicemen who established in the European Court of Human Rights in 1999 a finding of unlawful dismissal because of his sexual orientation; represented Camelot PLC in the High Court in 2000 and established that the National Lottery Commission had treated it unfairly in rejecting its application to renew its licence to run the National Lottery; acted for the League Against Cruel Sports in defending a challenge to the validity of the Hunting Act 2004; represented a woman who established that she was entitled to be prescribed with the breast cancer drug Herceptin; and was briefed by the Kingdom of Saudi Arabia in its claim to state immunity against claims of torture. In 2007, Pannick appeared for BBC director-general Mark Thompson when an attempt was made to prosecute the BBC for blasphemy for broadcasting . In July 2008, he represented the British Olympic Committee in successfully resisting in the High Court the claim by athlete Dwain Chambers about the refusal to select him for the Beijing Olympics because of the earlier finding of doping. Later that year he represented Debbie Purdy in the Appellate Committee of the Lords to establish the duty of the Director of Public Prosecutions to publish guidelines on prosecuting for assisting a suicide. More recently Pannick acted for AF, a man subject to a control order, establishing that the Home Secretary had a duty to inform him of the essence of the case against him. He represented the Crown in the Supreme Court in establishing in 2010 that MPs accused of dishonestly claiming expenses were not entitled to the benefit of parliamentary privilege. In January 2011, he represented Max Mosley before the European Court of Human Rights in his claim that the right to privacy obliged the United Kingdom to impose duties on newspapers to give prior notice of a publication invading privacy so the subject could seek an injunction. He appeared for a school in the first hearing before the new Supreme Court on 2 October 2009, about the school's admissions policy. In 2011 and 2012, Pannick also represented the Government of Hong Kong in Vallejos v. Commissioner of Registration, a case in which a foreign domestic helper sought judicial review to determine whether it was constitutional for the government to deny her the right of abode in the territory. In October 2016, he co-wrote a legal opinion commissioned by businessman Philip Green to challenge the conclusions of a parliamentary inquiry which criticised Green's conduct over the collapse of retailer British Home Stores. Also in 2016, Pannick successfully represented Gina Miller in R v Secretary of State for Exiting the European Union, an action against the Secretary of State for Exiting the European Union on whether approval by Parliament was required before the Prime Minister could initiate proceedings under Article 50 of the Treaty of the European Union to take the UK out of the European Union. Pannick successfully led the team working on behalf of Gina Miller in R v The Prime Minister, arguing against the legality of the Government's prorogation of Parliament in September 2019. In the ruling on the morning of 24 September 2019, the UK supreme court unanimously judged that the Prime Minister Boris Johnson had given unlawful advice to the Queen.
I Have to Move My Car: Tales of Unpersuasive Advocates and Injudicious Judges
Personal life
He married Denise Sloam in 1978. The couple had two sons and one daughter. She died of cancer in 1999. Pannick married Israeli-born lawyer Nathalie Trager-Lewis in 2003. The couple have two daughters and a son. He is Jewish.