A powerful new cross-party campaign is threatening to derail Theresa May's plans to expand the number of grammar schools in England.
Former Conservative Education Secretary Nicky Morgan is joining forces with Lib Dem ex-Deputy PM Nick Clegg and Labour ex-shadow education minister Lucy Powell to oppose the proposals.
Mrs Morgan says the priority should be to make all schools good.
But Mrs May says her "personal mission" is to increase diversity in schools.
In a joint article in the Observer, Mrs Morgan, Mr Clegg and Ms Powell argue that…