Ministers warn harder EU exit risks breaking up Britain

Theresa May is being warned by cabinet colleagues that a shift towards a harder Brexit will hasten the break-up of the UK, amid a renewed attempt by Brexiters to secure a clean split from the European Union.With senior Tories warning that the prime minister now risks a diplomatic calamity on the scale of the Suez crisis, following her disastrous Salzburg summit, she is facing a renewed campaign among ministers and influential backbenchers to ditch her current plans and back a looser free trade d