“There are five days to save Brexit,” Mr Davis said.
“If we don’t get a Conservative government after Thursday then the prospect of us ever leaving the European Union is seriously at risk. We will not get the outcome that the people voted for last year.”
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Mr Davis said Brexit was the single most important deal in the country’s history and that a vote for Jeremy Corbyn would put it in jeopardy – and could also lead to the break-up of the United Kingdom.
There are five days to save Brexit
Brexit minister David Davis
His warning came as doubts were raised about the huge financial cost of a Labour government and the risk it would pose to our security.
Mr Davis said of Brexit: “We recognise that this is the single most important issue of this age. If we get this right then there is a huge upside.”
He appealed to supporters of all parties who voted in favour of Brexit to “lend” the Conservatives their vote on polling day if they want to secure Britain’s future for the next five years and beyond.
Mr Davis said every vote for the Conservatives would strengthen Mrs May’s hand
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But he also made an overt pitch to Remainers who want to see the next government make the best fist of the negotiations.
“This is not an appeal to the 52 per cent (who voted to leave the EU). This is an appeal to the 100 per cent,” Mr Davis said.
“If you look around at the surveys and opinion polls that have been carried out you find that the majority of people want us to get on with it, Leavers and Remainers together. Something like 70 per cent or more want us to get on with it and get a good deal.”
Admitting the Tory campaign had suffered a “wobble”, he played down speculation that Mrs May was banking on a landslide victory to boost her government in the negotiations.
However, he stressed the importance of getting “a working majority”, spelling out the dire consequences of a Corbyn-led minority government propped up by the Scottish Nationalists and Liberal Democrats.
The Brexit Secretary made his comments after SNP leader Nicola Sturgeon said she would start “all sorts of talks” with Mr Corbyn in the event of a hung Parliament and the Lib Dems’ former business secretary Vince Cable admitted his party would support a Labour government on a vote-by-vote basis.
Mr Davis said: “With a Corbyn government in a minority position he would need all the opposition parties to lend him their support.
Brexit s the single most important issue of this age, says Davis
Given what we have seen so far, it is highly probable he would give the Scot Nats exactly what they want, which is a second independence referendum with the threat of the breakup of the UK, and the Lib Dems what they want, which is another referendum on Europe.”
Mr Davis said Labour’s plan for Brexit was a “pale shadow” of what his party was offering.
“Labour has about half a dozen policy positions on Brexit,” he said.
“Take migration. We have had them saying they want to maintain free movement and they want to do away with free movement and have immigration controls.
“With this level of incoherence it is unsurprising that their policy is like a pale shadow of ours. It’s trying to copy bits of ours and that doesn’t work.”
Mr Davis, MP for the Yorkshire constituency of Haltemprice and Howden, said the Tories had put forward a “very explicit” plan for leaving the EU.
“We don’t want to fall out with them on the one hand, but on the other hand we want to give ourselves the freedom to make the most of the global market, which is much larger than the European market and already provides nearly 60 per cent of our trade.
“One-and-a-half billion people speak English around the world, it is the language of Shakespeare, it is also the language of science, of medicine, of engineering. It is the language of the internet, of the media and it is the language of international law too.
A vote for Jeremy Corbyn would put Brexit in jeopardy, says Davis
“The old Commonwealth is now growing faster than Europe and that’s a huge market for us. We want to find a new place in the world and it is a new and greater place than the one that is constrained by us not being able to do our own trade arrangements, not being able to have our own relationships with these countries – that’s the upside, that’s the prize.”
Mr Davis said he had encountered traditional Labour voters on the campaign trail who were switching to the Tories because they do not support Mr Corbyn’s opposition to Trident and because of Brexit.
Speaking of one couple he met in Barrow, he said: “I asked them if they voted Leave and they said, ‘No we voted remain but we think you are the people who can deliver the best Brexit’. I have had similar conversations up and down the country.
"So this is an appeal to the 100 per cent.
"We want to get you the best deal for your job, the best deal more importantly in some ways for your children’s jobs and your grandchildren’s jobs.”
Mr Davis repeated his view that no deal would be better than a bad deal and criticised Mr Corbyn for saying no deal would be bad for Britain.
“If you want to buy a house and you say, ‘I am going to buy it whatever the cost’, the price would go up,” Mr Davis said.
Mr Davis repeated his view that no deal would be better than a bad deal
“This is a more complex negotiation but the principle if the same. Let’s imagine Labour won and it’s possible – the polls are all over the place – and there is a coalition. It would be them and Nicola Sturgeon, who doesn’t want to leave at all, and the Lib Dems, who don’t want to leave at all, and maybe Plaid Cymru, who don’t want to leave at all.
“Suddenly they are faced with a European negotiation where they are told they are facing a £100billion upfront bill, told you have got to accept all these limitations on tax, regulations on law, we are going to give you only limited access to the market. Are you telling me you don’t reserve the right to walk away under those circumstances?
“I could draw you a very nasty deal which would suit everyone in Europe – they get their money, they get the protection of their industries and we get nothing. That’s not what the British people voted for.
“So you have got to be open-eyed about this. You treat them in a civilised way and we expect them to treat us in a civilised way but you have got to back it up with a bit of steel.”
Mr Davis said that so far other European leaders had been pleasantly surprised by the Prime Minister’s attitude towards the negotiations.
“We have made it very clear that we want to be good friends and be in Europe but not the European Union, that we are going to meet our international obligations where defence and counter terrorism is concerned, that we want Europe to succeed.
“The Europeans were surprised and pleased by that because they had taken the referendum result almost as a rejection of them in total, which it wasn’t.
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Jeremy Corbyn during a visit to Hackney Marshes Football Pitches, to highlight Labour's manifesto commitment to ensure 5% of the Premier League's television rights income is diverted to the grassroots game, during a General Election campaign
“What’s interesting is that they recognise that what we have put to them is a logical entity. We have done everything possible to be diplomatic and to make friendly overtures to try to allay their worries that we are going to try to break up the rest of the European Union.
“So when Jeremy Corbyn accuses us of being aggressive, it is a little ill-informed to say the least. But it doesn’t mean the negotiation itself isn’t going to be robust. Of course we will be polite, of course we will never start a fight spontaneously, but we will respond to what we think is not appropriate behaviour or people making excessive claims.”
Mr Davis said every vote for the Conservatives would strengthen Mrs May’s hand.
“People forget that the election was called after taking Article 50 through the House of Commons and at every turn people who claimed to have accepted the judgment of the people tried to put conditions on it.
“They were saying, ‘You can’t do this, you can’t do that. You can leave the European Union but you can’t leave the single market or the customs union’. Basically they were trying to put impossible conditions on the negotiations so we said to ourselves, we have got a mandate to leave, and we now need to have a mandate on how we leave.
Every vote for a Conservative candidate strengthens May's position in Brexit negotiations says Davis
“That’s the fundamental point about this election – it’s seeking a mandate for the House of Commons but also a mandate for the House of Lords.
"They were being problematic and there is a thing called the Salisbury Convention which means that if something is in the general election manifesto, they cannot block it.
"So it is important that everyone understands that having a general election was about enabling a robust and effective negotiation process without the other side of the negotiation thinking we are somehow weakened back in Britain.
“This is why we are saying every vote for a Conservative candidate strengthens Theresa May’s hand 11 days after the election when the negotiations begin.”