BORIS Johnson today declared himself “The Dude” as he was named the next Prime Minister after defeating Jeremy Hunt in a landslide.

The new Tory leader will have just 100 days to deliver on his do-or-die promise to take Britain out of the EU on October 31 – after winning twice as many votes as his rival.

In a sharp break from buttoned-up Theresa May, BoJo used his victory speech to make a string of jokes as he pledged to unite the shattered Tory party.

He said: “We know the mantra of the campaign just gone by – deliver Brexit, unite the country and defeat Jeremy Corbyn and that’s what we’re going to do.

“I know some have already pointed out ‘deliver, unite and defeat’ was not the best slogan because it spells out ‘dud’. But they forgot the final E – for ‘energise’!

“I say to my doubters – DUDE, we’re going to get Brexit done on October 31.”

Boris rode a wave of optimism with his charismatic personality to sweep aside a huge field of challengers and win the support of grassroots Conservative activists.

Mr Johnson won over 66.4 per cent of members’ votes, with Mr Hunt trailing far behind on just 33.6 per cent.

But in a sign of the challenge facing the next PM, Remainer minister Anne Milton today became the latest to quit because she can’t serve under Boris.

And will also have to face off the threat from Nigel Farage and his Brexit Party who will leap on any hint of wavering in talks with Brussels.