Christopher Wylie, a former director of research at Cambridge Analytica, addresses the crowd at the Fair Vote rally outside the House of Commons on Parliament Square, central London on the evening of 29 March 2018.

Vote LeaveBeLeaveBrexitEUreferendum campaignUKCambridge AnalyticaChristopher WylieShahmir SanniFair VoteFair Vote NowBrexit rallyantiBrexit rallysecond referendum