(FILES) In this file photo taken on November 14, 2018 Pro-European Union (EU), anti-Brexit demonstrator Steve Bray holds placards and wave Union and EU flags as they protest outside of the Houses of Parliament in London on November 14, 2018. - Severing a truculent partnership stretching back five decades, Britain finally went its own way late Thursday four-and-a-half years after its shock referendum verdict in favour of divorcing the EU. Brexit became reality as Big Ben struck 11:00 pm (2300 GMT) in central London, just as most of the European mainland ushered in 2021 at midnight. (Photo by Ben STANSALL / AFP)