Boris Johnson has thrown his weight behind a new group aimed at ensuring Theresa May delivers a 'hard Brexit'.

The Foreign Secretary has declared he is backing the Change Britain campaign, whose aims include a "return" of controls over borders, laws, money and trade from the EU to Britain.

The group is being led by leading Vote Leave figures, including Michael Gove and Nigel Lawson, Baron Lawson of Blaby, the former Tory chancellor .

It comes as John Whittingdale, the former culture secretary, called on Theresa May to trigger the start of Britain’s formal withdrawal from the European Union within weeks.