Davies resigned as Leader of the Welsh Conservatives on 27 June 2018. A source close to Davies described the events at the time as "the revenge of Tory Remainers who can’t forgive him for going against Cameron and campaigning for a Leave vote in the Brexit referendum." Davies resignation was viewed by some in the media as sparked by Davies' "inflammatory remarks" towards Airbus. Sources close to Davies however spoke to the media and stated they felt he had been victim of "a plot to get rid of him for "seven or eight weeks" dating back to his controversial "decision to back a Leave vote in the 2016 Brexit referendum" which came against the wishes of then Prime Minister David Cameron, who had backed Remain.