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MPs will formally debate whether to force the 'architect' of Brexit to appear before an inquiry on fake news.

The full House of Commons debate will take place tomorrow after Dominic Cummings repeatedly refused to face questions over his conduct.

Ex-Vote Leave director Mr Cummings stands accused of "flagrant contempt" of Parliament by refusing to face the Digital, Culture, Media and Sport Committee.

Mr Cummings is a former aide to Tory Michael Gove and was credited with creating the infamous misleading pledge to take back £350million a week for the NHS.

He replied to formal invitations by accusing MPs of "greater interest in grandstanding than truth-seeking".

(Image: Getty Images Europe)

Now MPs could pass an "Order of the Whole House" tomorrow demanding Mr Cummings face questions.

If he continues to refuse to appear, he could be held in Contempt of Parliament.

In theory the penalties include fines and even imprisonment - but fines have not been imposed by the Commons since the 17th Century.

The committee, led by Tory MP Damian Collins, has been investigating fake news, as well as the use of voters' data in the 2016 EU referendum .

(Image: Getty Images Europe)

It wants to question Mr Cummings about Vote Leave's use of online ad firm Aggregate IQ, which has been linked to SCL Group - the parent company of Cambridge Analytica - and which received 40% of the official Brexit campaign's entire advertising budget.

Mr Cummings previously told the committee: "Your threats are empty.

"I will not come to your committee regardless of how many letters you send or whether you send characters in fancy dress to hand me papers."

Asked for his reaction yesterday, Mr Cummings said: "Watching Parliament's obsession with trivia in the face of the Cabinet's and Whitehall's contemptible failure to protect the interests of millions in the farcical Brexit negotiations is like watching the secretary to the Singapore Golf Club objecting to guns being placed on the links as the Japanese troops advanced."