Gina Miller
Gina Nadira Miller (née Singh; born 19 April 1965) is a Guyanese-British business owner and activist who initiated the 2016 R (Miller) v Secretary of State for Exiting the European Union court case against the British government over its authority to implement Brexit without approval from Parliament. In September 2019, she successfully challenged the government's prorogation of Parliament, formally supported in the legal proceedings by the former prime minister Sir John Major and the shadow attorney general, Shami Chakrabarti.