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A bid to secure a hearing to force Boris Johnson to obey MP’s demands that he delay Brexit if Parliament rejects his deal tomorrow has been refused.

Civil right's group Liberty's request for an urgent hearing was dismissed by the Court of Appeal, despite fears Mr Johnson will cause "irreversible damage" if he refuses to obey the law.

The PM has pledged to flout a law which would force him to request a Brexit extension if parliament had failed to approve a deal by Saturday Oct 19 - blocking out a no deal Brexit .

MPs will vote on Mr Johnson’s newly secured deal tomorrow - but he has claimed he would rather “die in a ditch” than request more time from Brussels.

The organisation's application for an expedited hearing was previously rejected by Mr Justice Supperstone, a High Court judge, following consideration of the court papers.

Speaking after the bid was turned down Martha Spurrier, Liberty director, said: "This fight continues because our democracy is at stake.

"Today in court the Prime Minister confirmed our worst fears that he thinks he can take steps which we say would subvert the law.

"No one is above the law and Liberty will stop at nothing to hold the Government to account."

(Image: Getty Images)

The application was refused by the Lord Chief Justice Lord Burnett, Master of the Rolls Sir Terence Etherton and President of the Queen's Bench Division Dame Victoria Sharp.

Lord Burnett said: "It is clear to us that Mr Justice Supperstone made no error of principle or acted outside the proper limit of his judicial discretion in making the case management decision under challenge.

"We will give our full reasons in due course in writing."

Civil Rights group Liberty, who launched the application, said it was neutral on the issue of Brexit, but not on the PM obeying the law.

Before the hearing Liberty’s Martha Spurrier said: “This case is about ensuring that the Government – whoever it is, or whatever its intention – acts within the law.

"Any Government which defies Parliamentary process and law because it doesn’t serve their aims should be a cause of concern for everyone.”

Last week, the Court of Session in Edinburgh refused to grant an order forcing the PM to obey the law, after UK government’s lawyers told the court Mr Johnson would write an extension letter if required by law and argued that a legally binding order was therefore not needed.