"What we need now is an agreement between the European Union and Britain" to stem the flow of illegal migrants across the Channel, says French Interior Minister Gerald Darmanin at a press conference in Paris. "An agreement would set the framework for cooperation between Britain and bordering countries on immigration issues that were not negotiated at the time of Brexit," he adds. France's Prime Minister Jean Castex is preparing to write to his British counterpart Boris Johnson with proposals for a post-Brexit deal. [COMPLETES VIDI9TM2KM_EN] IMAGES AND SOUNDBITES