Chequers dinner could end in murder on the Brexit express

May is said to be heading for a soft Brexit. Is she about to push her leavers too far?An English country house, a polite but inscrutable host and an ill-assorted band of guests, each with a motive to stab each other in the back. Theresa May’s Brexit house party at Chequers next Friday sounds more like the set-up for an Agatha Christie mystery than a cabinet meeting.But drumming up a sense of drama has become another tool in the prime minister’s battle to unite her scrapping ministers