Back from his holiday in Mustique the Prime Minister faces his first major foreign policy crisis. Brexit editor, Edward Evans, explains the challenges to Bloomberg Westminster's Caroline Hepker and Sebastian Salek. Plus how far will Labour's National Executive Committee go to ensure its candidate wins the party leadership? And the deputy chair of the HS2 review panel slams the high-speed rail project, but LSE Professor Tony Travers, another member of that panel, says the decisions are always political.

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