The former Chancellor accused Mr Johnson’s most senior aide, Dominic Cummings of forcing through a no deal, according to The Times. Mr Hammond believes Mr Cummings is making demands that Brussels “cannot, and will not, accede to”. He attacked the Prime Minister for allowing “unelected people” to “pull the strings” of his Government.
Mr Hammond wrote in The Times: “The move from demanding changes to the backstop to demanding its total removal is a pivot from a tough negotiating stance to a wrecking one.
“The unelected people who pull the strings of this government know that this is a demand the EU cannot and will not accede to.
“Not just because they will be stubborn in their defence of the single market but because the fragility of their own coalition of 27 means that any attempt on their side to reopen the package would see their unity collapse.
“They will not take that chance and the smart people in Whitehall know it.”
READ MORE: Bercow vows to BLOCK Johnson's Brexit plan
Brexit news: Boris Johnson risks betraying the public allowing a no deal, warns Philip Hammond
He added: "Far from being a powerful independent United Kingdom making its voice heard on the world stage, the reality would be a diminished and inward-looking Little England, inexorably squeezed between the emerging economic power blocs."
Mr Hammond went on to accuse Mr Johnson of not showing enough evidence that he wants a deal with the European Union.
He wrote: “In 2016 the British people were invited to vote for a Brexit with a deal, and by a small margin they did so.
“They were told that a deal to protect Britain’s trade with the EU — our largest export market by far — would be “easy” to do.
“To pretend now that 2016 Leave voters voted for a hard no-deal Brexit is a total travesty of the truth.”
Mr Hammond’s warning comes as John Bercow has insisted he will “fight with every breath” to stop Mr Johnson from passing a no deal.
Mr Bercow said in Edinburgh: “If there is an attempt to circumvent, to bypass or – God forbid! – to close down Parliament; that is anathema to me and I will fight it with every bone in my body to stop that happening.
“We cannot have a situation in which Parliament is shut down – we are a democratic society.
“And Parliament will be heard and nobody is going to get away as far as I am concerned with stopping that happening.”