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Brexit bluster smacks of Boris Johnson preparing to let down hoodwinked Tories after conning them into crowning him Britain’s next Prime Minister.

The serial liar’s ignorance and oscillation, changing his mind more often than his socks, is a klaxon heard by all except his fanatics.

Johnson’s built a career on treachery and, should he reach No 10, will be desperate for Parliament to stop the Halloween horror of Britain leaving Europe after October 31 without a deal.

Even a sophist as reckless as this would gulp, terri-frited of crashing the economy when leaving deal-less destroys free trade with valuable neighbours – slapping 10% taxes on cars and 35% on dairy foods.

The blond bumbler has legitimised misunderstanding with a shamelessness matching his £350,000 dishonesty. Rival Jeremy Hunt is discreditably torn between exposing Johnson’s fibs and inventing his own hard Brexit fantasy, the Foreign Secretary afraid 160,000 Tories don’t want the truth before imposing a new PM on Britain.

Playing the fool is Johnson taking people for fools again, doubling down rather than embracing reality.

He’s testing to destruction the theory that politicians can fool all the people some of the time and some of the people all the time but not all the people all the time. Theresa May’s chief Brexit negotiator Olly Robbins jumping to a money-spinning City job before he was almost certainly sacked by the next Tory PM will leave Johnson carrying the can when talks stall before the October witching hour.

George Canning’s 119 days as PM before his death in April 1827 is the shortest term in the office.

Tories fear of losing earlier will make Johnson hesitate before gambling on an immediate election.

Demand saner Tories back no deal and rebels siding with Labour in a no confidence vote would see him taking Canning’s title.

Blame for no Brexit must be ­Johnson’s – the snake oil salesman summoned by desperate Tories to fight the Brexit Party’s snake oil salesman Nigel Farage finally destroyed in the job he craved by lies which grabbed him the post.