SO WHAT WILL BORIS DO NOW?

BORIS JOHNSON was last night facing mounting pressure to show his hand and come out in favour of Brexit.

The London mayor has apparently still not made up his mind on whether to support the Leave campaign.

He has made Eurosceptic noises over the past few years, but the expectation after he was invited to Downing Street earlier this week was that he has agreed to back Mr Cameron.

The fig leaf for this decision was expected to be a new law guaranteeing the sovereignty of the British Parliament over the EU.

But the derision with which this proposal has been met makes it harder for Mr Johnson to claim it as a reason for persuading him to stay in. Yesterday, hundreds of grassroots Tories tweeted the London mayor to urge him to ‘be brave’ and lead the Out campaign. Alex Deane, former chief of staff to Mr Cameron, said: ‘The Party’s membership needs a champion with significant, mass appeal, political and cultural clout, to represent our dissatisfaction with the failure of the government to meaningfully deliver on its manifesto pledge of reform in our relationship with the EU.

‘It is with this in mind that I urge the Mayor of London, Boris Johnson, to throw his weight behind the Brexit campaign, and help lead Britain out of a tired, fundamentally flawed, failing political union.

‘Boris must surely feel the hand of history on his shoulder at this pivotal moment. His involvement in the campaign to lead Britain out of the European Union could tip the scales. Come on, Boris. Be brave. Back Brexit.’