(FILES) Royal National Lifeboat Institution (RNLI) Severn class lifeboat, the City of London II, makes its way towards migrants travelling in an inflatable boat across the English Channel, bound for Dover on the south coast of England, on April 5, 2023. June 23, 2026 marks 10 years since the UK voted for Brexit, upending the country's politics and triggering fraught negotiations that finally concluded when it left the European Union in January 2020. Immigration, trade and the economy were all key issues during the Brexit campaign. (Photo by Ben Stansall / AFP via Getty Images)