The EU could fall apart if Britain votes to leave, Philip Hammond warned today as a new poll suggested voters are moving further towards backing Brexit.

The Foreign Secretary predicted the 'contagion' of Britain quitting the EU would spread to other member states and said the UK would only be able to watch from the sidelines as the EU 'lurches in very much the wrong direction'.

It comes as a new poll today finds six in ten voters have no faith in David Cameron winning a good deal for Britain as he seeks to finalise his renegotiation at a crunch summit this week.

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Time to leave? Philip Hammond checks his watch on the Andrew Mar show this morning, when he warned voters that the 'contagion' of a Brexit could spread across the continent

Just 21 per cent of the public expect David Cameron to get a good settlement in his reform package when he heads to Brussels on Thursday, according to a Comres survey for the Independent on Sunday.

Mr Hammond's intervention has caused further outrage among Eurosceptics, who are angry that Mr Cameron allows pro-EU ministers to speak in favour of staying in but is blocking anti-EU ministers from speaking out until after the Cabinet meets following this week's EU summit.

Warning that Britain would have to forge a new relationship with a very different kind of EU if voters opted to leave, Mr Hammond told the Andrew Marr Show: 'What I think I fear and many people in Europe fear is that without Britain Europe would lurch in very much the wrong direction.'

'Britain has been an enormously important influence in Europe, an influence for open markets for free trade.

'I think we would be dealing with a Europe that looked very much less in our image. I think the thing we have to remember is that there is a real fear in Europe that if Britain leaves the contagion will spread.

The Foreign Secretary, pictured on the Andrew Marr Show, said Britain would only be able to watch from the sidelines as the rest of the continent 'lurches in very much the wrong direction' if voters opt to leave

David Cameron heads to Brussels for a crunch EU summit on Thursday where he will hope Angela Merkel, pictured with the Prime Minister on Friday evening, will agree to his draft EU deal

'People who say we would do a great deal if we left forget that the countries remaining in the EU will be looking over their shoulder at people in their own countries saying, "Well, if the Brits can do it, why can't we".

JUST ONE IN FIVE VOTERS BELIEVE THE PM WILL GET A GOOD EU DEAL Six in ten voters have no faith in David Cameron, pictured, getting a good deal from the EU this week Just one in five voters believe David Cameron will bring back a deal that is good for Britain when he travels to Brussels for his crunch Brussels summit this week. Six in ten believe he will fail, according to a ComRes poll for the Independent on Sunday. A week after Mr Cameron warned that a Brexit could see thousands of migrants arriving from Calais 'overnight', the poll finds that 47 per cent of Brits believe Britain would be better able to manage migrants trying to come to the UK from Calais if it left the EU, Just 29 per cent believe Britain would best be able to manage migration by staying in the EU. And in a blow to Mr Cameron's personal ratings, less than a third of people now look on him favourably - a drop of seven points in the last three months. But the survey showed voters believe Britain's economy is better off for being inside the EU, with 39 per cent agreeing and 36 per cent disagreeing. Advertisement

'They will not have an interest in demonstrating that we can succeed outside the EU.'

Last night Downing Street cancelled a Cabinet meeting that was due to be held tomorrow.

The Prime Minister was due to set out the rules for when Cabinet ministers will be free to campaign but there are too many ministers abroad for the meeting to take place.

Graham Brady, the chairman of the influential 1922 committee of backbench Tory MPs, said it was crucial that the Government holds a Cabinet meeting as soon as possible after Mr Cameron returns from Brussels on Friday, when he hopes to have agreed a deal with EU leaders.

Number 10 said it was only during times of war that Cabinet met at the weekend, meaning ministers will have to wait until Monday to start campaigning for Brexit while pro-EU ministers are free to dominate the airwaves for 48 hours after the EU summit ends.

Mr Brady told Sky News: 'It's in everybody's interests to do this as quickly as possible.

'If it were to appear that David Cameron was seeking to have the whole weekend to himself to put one side of the argument, I think that would look bad for the remaining campaign.

'People want an honest, fair debate. They want an honest, fair campaign, so I think it's in the interests of both sides to have that early cabinet meeting and to make sure that people who want to speak out and exploit the freedom of conscience that has rightly been agreed can do so as soon as possible.'

Meanwhile the Prime Minister was humiliated today as the man who he tasked with steering the EU referendum bill through the House of Lords announced he was joining the Out campaign.

Lord Dobbs, creator of the original House of Cards, dismissed Mr Cameron's renegotiation as 'a mouse that barely squeaks, let alone roars'.

As the sides in the campaign begin to gear up for an attritional four-month run-in to the likely referendum date of June 23, US secretary of state John Kerry has voiced support for Britain staying in the EU.

Mr Kerry said it was 'profoundly' in America's interests that the UK voted to remain in the union last night.

In his last big speech before the Brussels summit on Thursday and Friday, the Prime Minister told an audience in Hamburg on Friday night that Europe had to 'stand together' against threats such as ISIS and Russian aggression.

David Cameron made his last big speech before the crunch Brussels summit on a visit to Hamburg on Friday, when he met with German Chancellor Angela Merkel and Hamburg Mayor Olaf Scholz and his wife Britta Ernst, pictured above

Foreign Secretary Philip Hammond, pictured on the Andrew Marr Show, predicted talks on Britain's renegotiation would go 'down to the wire' on Friday as there was a lot of work still to be done

He also appealed for Germany's help in finalising his package of reforms, stressing the countries' shared interests and values.

Mr Hammond predicted the talks on Mr Cameron's EU deal would go 'down to the wire' in Brussels this week, warning there was still plenty of work to be done to secure a deal.

'There isn't a deal yet, there is a working draft,' he said.

'There are lots of moving parts we've got negotiation that will run through this week and I have no doubt will run right to the wire with some of these things only being able to be decided by the heads of state and government on Thursday when they sit down in that room together.'

CRUNCH WEEK FOR BIG EU VOTE MONDAY David Cameron had called a crunch Cabinet meeting to fire up Ministers for the negotiations in Brussels – but has been forced to cancel it as too many of his senior team were out of the country. One sardonic source said: ‘The most crucial Cabinet since the Election is scrapped due to skiing holidays.’ TUESDAY The Prime Minister flies to the European Parliament to discuss his reform plans. He will to try to win politicians over as the Parliament is likely to vote on whether Britain is allowed to apply an ‘emergency brake’ on benefits to EU migrants. THURSDAY Today the talking will start in the Justus Lipsius building in Brussels. The draft agenda says the UK deal should be concluded over dinner. FRIDAY Friday is meant to be set aside for talks on migration. But sources acknowledge that UK negotiations might stretch into a second day. They could even be a ‘three shirter’, running into Saturday. Although diplomatic ‘sherpas’ have started talks, four of Britain’s key demands remain in the air: the UK’s wish to halt ever-closer union, protection from the eurozone block, the brake on benefits and curbs on child benefits for migrants. NEXT After the summit, the PM has pledged a Cabinet meeting, after which Ministers will be free to announce whether they back ‘In’ or ‘Out’. No date has been set, but Mr Cameron is under pressure to hold it on Saturday. Advertisement