Images of copy of Boris Johnson's letter to Juncker Britain unveiled its own Brexit plan for keeping the Irish border open, with Prime Minister Boris Johnson warning the only alternative was leaving the European Union on October 31 without any deal. After earlier saying that this was his "final" offer made 29 days before the Brexit deadline, Johnson wrote in a letter to European Commission president Jean-Claude Juncker that London's long-awaited proposal was "a reasonable compromise". IMAGES of a copy of Boris Johnson's letter to Juncker