Millions of EU migrants could enjoy preferential rights to come to Britain after Brexit , David Davis has revealed.

The Brexit Secretary indicated EU nationals could stay front of the queue to live and work in Britain after 2020.

Tory Brexiteers famously boasted the Leave vote would "take back control" of borders.

But at a Q&A, Mr Davis would not rule out giving EU citizens "preferential treatment" over arrivals from the rest of the world.

Instead he replied: "I’m not going to do that negotiation here”.

Pressed on the detail he added: "I’m not expecting a visa arrangement between ourselves and the European Union.”

Most non-EU nationals need a visa for a long stay in the UK.

The News Explained - How has immigration to the UK changed over the years?

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But Brussels could demand softer rules in exchange for market access once free movement ends in December 2020.

Asked if EU migrants might be covered by a work permit system, rather than visas, Mr Davis repeated: “I don’t foresee a visa arrangement.”

Speaking at the Spectator magazine event on Wednesday night, he added: "The aim of the exercise is to run our immigration policy in the economic interests of the nation.

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"So we aren’t going to switch off all the scientists, or the engineers, or for that matter even the farm workers necessarily. Because the effect of that will be to damage an industry."

The government's Migration Advisory Committee is due to report back in September and a Bill with more detailed policy will go before Parliament.

It came as Nigel Farage warned today that a second Brexit referendum would unleash “total chaos”.

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Speaking to The UK in a Changing Europe think tank, he claimed there “clearly is a big establishment attempt" to prompt a second vote.

The former UKIP leader added: “I think you would see a kind of backlash of public anger unlike anything you have ever seen before in this country.”

He insisted "there isn’t going to be a second referendum".

Yet Tony Blair - speaking at the same event - stepped up his campaign to torpedo Brexit.

The former Prime Minister believed it was “more likely” now that Brexit could be stopped, adding: “It’s not too late until we leave.”

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He added: “In times to come we are going to be a medium-sized country in a world of tall countries and three giants - America, China and India.”

Mr Blair slammed the UK’s image abroad following the referendum, saying: “We shouldn’t kid ourselves - the rest of the world do not see this as ‘globally ambitious Britain’, they really don’t.

“They think, ‘Oh, Brits you guys were always common sense people’.

“There’s a really quite fundamental mismatch between the rhetoric the Prime Minister and other ministers are using around this and how the rest of the world sees it.”

Mr Blair claimed Tory unity on Brexit would pave the way for Jeremy Corbyn to become Prime Minister.

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“If they [Tories] have still got Brexit round their neck as the mill stone, they are in danger of going down,” he added.

In news that will cheer Brexiteers, the former PM pledged to quit the political frontline once again if the UK leaves as planned on March 29, 2019.

“If we go ahead and we leave then for me that’s over, you will hear no more about changing the decision,” he promised.

Meanwhile Theresa May twice ducked the question of whether she believes Brexit will be "worth it”.

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But touring the UK today the PM insisted she was was “looking forward” to Brexit day “because it presents great opportunities for the United Kingdom”.

Meeting textile workers at a factory in Ayrshire and a parent and toddler group in Newcastle, she said: “Brexit provides us with opportunities. I want to see us coming together."

Meanwile, International Trade Secretary Liam Fox refused to rule out a Brexit transition period stretching beyond 2020, but said it was “not likely to happen”.