2019, Prime Minister Boris Johnson prorogued Parliament over Brexit. As President of the Supreme Court of the United Kingdom, Lady Hale found that Johnson's prorogation was unlawful, terminating the suspension of Parliament. Hale described the ruling as "a source of, not pride, but satisfaction." In 2020, reaching the mandatory retirement age, Hale retired from the court. Hong Kong judgeship On 21 March 2018, the Hong Kong judiciary announced her nomination as a non-permanent judge from other common law jurisdictions of the Court of Final Appeal. Her appointment was accompanied by the appointments of Andrew Cheung and Beverley McLachlin. The appointment was gazetted by the Chief Executive of Hong Kong Carrie Lam and took effect 30 July 2018 for a three-year term. In October 2020, after China imposing a controversial national security law on Hong Kong, Hale expressed her concerns about hearing cases in Hong Kong: "I have never sat and it has not been arranged at least for me to sit . . . when that happened I would have a serious moral question to ask myself." In June 2021, she revealed her wish of not wanting to be reappointed as a judge in Hong Kong after her three-year term ending in July. As she was making her decision known before a webinar, she also mentioned the impact of the security law and said, ‘The jury is out on how they will be able to operate the new national security law. There are all sorts of question marks up in the air.’ However, the Hong Kong Judiciary claimed that her leaving was for personal reasons. Hale became the first senior British judge to quit Hong Kong’s top court after her fellow judge, Australian James Spigelman resigned as a Hong Kong judge in November 2020. Significant lectures On 27 June 2011, Lady Hale gave a lecture in memory of Sir Henry Hodge, "Equal Access to Justice in the Big Society" in which she explains the benefits of an inquisitorial Tribunal system over adversarial proceedings. On 10 September 2015, Hale delivered the Caldwell Public Lecture at the University of Melbourne, Australia, on the topic "Protecting Human Rights in the UK Courts: What are we doing wrong?". On 2 November 2018, Hale delivered an SLS Centenary Lecture at the University of Essex, United Kingdom, on the topic of "All Human Beings? Reflection on the 70th Anniversary of the Universal Declaration of Human Rights".