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A Tory MP has publicly dared Theresa May to sack him from his government role in a bombshell interview over Brexit .

Huw Merriman - who is an aide to the Chancellor - announced he will speak at a rally in support of a second referendum at lunchtime today in Westminster.

And he warned Tory chiefs will have to sack him from the government if they don't like it.

The Parliamentary Private Secretary said he had backed a so-called People's Vote in a "free vote" last week - only to be told it was not government policy.

He told BBC Radio 4's Today programme: "If I can’t speak freely and explain how I voted on a free vote... I didn’t give up my career to come into Parliament for that - it’s absolutely ridiculous.

(Image: PA)

(Image: SIPA USA/PA Images)

"It would be nonsensical for me to be given a free vote, to be allowed to vote the way I wish to vote, but then to explain it I would lose my position.

“What kind of transparent politics is that?

"That’s politics of the madhouse and I’m just not willing to go along with that."

Mr Merriman admitted "I think it’s probably likely" he would be sacked from his junior frontbench role.

But he said it was crucial to put Theresa May's deal back to the British people in a "confirmatory" second referendum - in order to get Brexit passed.

(Image: AFP/Getty Images)

He said the choice should be between Mrs May's deal and revoking Article 50 to cancel Brexit.

Mr Merriman added: "I am going to speak I think it’s really important to explain the way I voted last week.

"It’s been made clear to me that that’s not government policy.

"My issue with that is a week ago we were given free votes and I was allowed to vote for this concept of putting the PM's deal back to the people to get it through.

"If I then get sacked for actually explaining the way I’ve voted in a free vote, that to me would be a new low in democracy."