• A view of Big Ben and the Houses of Parliament in London, February 16, 2017. (PA Wire)
Tony Blair is embarking on a mission to change hearts and minds on Brexit.
Source:
AAP
17 Feb - 9:32 PM  UPDATED 17 Feb - 9:40 PM

Former British Prime Minister Tony Blair will outline his "mission" to persuade people to "rise up" and change their minds on Brexit, arguing that the vote to leave the European Union poses a threat to the future of the country.

Current Prime Minister Theresa May has vowed to trigger Article 50 and start the process of leaving the EU next month, and has outlined her vision of a clean break from the bloc, including leaving the single market.

She has also warned politicians against disrupting the process.

However in his first major political intervention since the vote last June, Blair will issue a rallying cry on Friday to opponents of Brexit, saying there was little clarity over what the vote meant when the referendum took place, and that the government was set on "Brexit At Any Cost".

"The people voted without knowledge of the true terms of Brexit. As these terms become clear, it is their right to change their mind," he will say to pro-European group Open Britain.

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Under no circumstances will British parliament entertain the idea of a second Brexit referendum, believing to do so would be patronising to the population.

"Our mission is to persuade them to do so."

Blair, who served as prime minister from 1997 to 2007, said that among the risks of Brexit, the issue of the break-up of the UK was now "back on the table".