Gina Nadira Miller
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 case by the former prime minister Sir John Major and the shadow attorney general, Shami Chakrabarti. She founded the True and Fair Campaign in 2012, calling for an end to financial misconduct in the investment and pension industries. She also founded the True and Fair Foundation.