Rupert Lowe, leader of the Restore Britain political group, declined to specify whether he considers King Charles III a "white Briton" during a BBC radio interview on August 7. The exchange took place in the context of a discussion about demographic changes in the UK, particularly a forecast predicting that white Britons could become a minority by 2063.

Lowe’s remarks referenced a controversial demographic report authored by Matt Goodwin, a senior research fellow at the University of Buckingham and a former Reform UK candidate. The study defines "white Briton" as an individual whose parents were both born in the United Kingdom, a definition that would exclude the King, as his father, Prince Philip, was born in Greece.

During the interview on the BBC's Today program, host Nick Robinson asked Lowe directly whether he considered King Charles III to fit the report’s definition of a white Briton. Lowe responded by stating that interpretations vary and suggested the question involved "splitting hairs." Robinson pressed for a clear answer, emphasizing the relevance of the definition to the discussion. Lowe avoided a direct response, asserting that most British people share the general experience the demographic data reflects.

Robinson criticized Lowe for evading the question and labeled him as someone airing personal prejudices on social media platforms. The interview highlighted tensions surrounding discussions of race, identity, and demographics within the UK, as well as the sensitivity involved in defining ethnicity in relation to public figures like the monarch.

Restore Britain has previously faced scrutiny for its stance on immigration and national identity. Lowe’s comments and refusal to directly classify the King’s ethnicity drew attention to the complexities and public sensitivities associated with demographic categorizations and the evolving ethnic composition of Britain’s population.