Image source, AFP/Getty Images

A look at the main stories today.

EU ministers are meeting in Brussels later amid warnings the migrant crisis could threaten the bloc's survival.

Austria and Balkan nations have agreed measures to restrict numbers, drawing criticism from Greece, where thousands have been left stranded after Macedonia blocked entry to Afghans.

Meanwhile Hungary has announced a referendum on whether to accept mandatory quotas of migrants.

More here

The legal status of David Cameron's EU reforms has come under the microscope after Michael Gove told the BBC they could be overturned by European judges unless treaties were changed. BBC political editor Laura Kuenssberg, who interviewed the justice secretary, has reflected on the political significance of his comments, while legal affairs correspondent Clive Coleman has taken a look at the technical arguments.

Earlier the PM clashed with Jeremy Corbyn at PMQs, telling the Labour leader to smarten up his appearance as the two leaders speculated on what advice their mothers would give them.

Elsewhere, the Electoral Commission said at least 770,000 names had been removed from the electoral register.

Thursday will see the latest quarterly migration statistics released, which could well play into the debate about the PM's EU reforms. We'll have coverage of the day's developments right here.

The Telegraph says Justice Secretary Michael Gove 'faces the sack' in a post-EU referendum reshuffle.

• Watch Michael Gove's interview with Laura Kuenssberg in full

The Guardian

Work and Pensions Secretary Iain Duncan Smith, who is campaigning to leave the EU, has told the Guardian, external David Cameron's reforms will not reduce the scale of migration coming to the UK.

Latest migration figures are due tomorrow, and Mr Duncan Smith said:

The head of the International Monetary Fund, Christine Lagarde, has said that the impact of the UK leaving the EU "is bound to be a negative on all fronts".

Speaking to CNN, she said: "Uncertainty is bad in and of itself. No economic player likes uncertainty. They don't invest, they don't hire, they don't make decisions in times of uncertainty."

She added: "My hunch… is that it [a vote to leave] is bound to be a negative on all fronts. For those who stay, because there are fewer of them, and for those who go, because they lose the benefit of that facilitation of exchange."

The Huffington Post

HuffPost UK picks up on comments from former Belgian prime minister, external Guy Verhofstadt that the UK's EU refendum is a "glorified cockfight" involving David Cameron and Boris Johnson.

"This deal is not about Europe, it is an attempt to re-unite the Tory party. I may not know the result of the referendum, but I am sure this will not re-unite the Tories," he told the European Parliament.

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Red herring or genuine concern? Is Justice Secretary Michael Gove correct that the prime minister's renegotiation deal is not legally binding?

The government has rolled out big legal guns to slap down its justice secretary.

Attorney General Jeremy Wright QC and former Attorney General Dominic Grieve QC have strongly contradicted him.

Mr Wright said: "The suggestion that this agreement does not have legal effect until it is incorporated into EU treaties is not correct.

"It has legal effect from the point the UK says it intends to remain in the EU, and the European Court must take it into account.

"The job of the European Court is to interpret the agreements between the 28 nation states of the EU.

"This is one of those agreements, with equivalent legal force to other agreements such as treaties."

So, who is correct - justice secretary or attorney general?

Read the rest of Clive's blog

Ben Wright
BBC political correspondent

Less than a week after David Cameron renegotiated what he said was a "watertight" deal on Britain's membership of the EU disagreements have emerged about the legality of the agreement.

The government's most senior law officer in England and Wales has issued a robust response to a claim by Justice Secretary Michael Gove that the deal agreed in Brussels is not legally binding.

Mr Gove - one one of five cabinet ministers calling for the UK to leave - has told the BBC that the European Court of Justice could throw out some of the changes before they were incorporated into EU treaties.

But this has been disputed by the Attorney General - and also by the man who brokered the deal, the President of the European Council, Donald Tusk, who expressed his views in the European Parliament earlier.

In the end, any EU law is open to interpretation by the European Court of Justice - although an agreement by 28 heads of government may make judges cautious of ruling a different way if a challenge is brought.

Laura Kuenssberg
BBC political editor

The BBC has been told that following Justice Secretary Michael Gove's interview with BBC political editor Laura Kuenssberg, Downing Street has ordered his department to stop showing him documents concerning the EU.

No 10 says Mr Gove was subject to the same rules as every minister arguing for Brexit and it was nothing to do with his comments.

David Cameron says the in/out vote on the UK's membership of the EU is just four months' away, and adds:

Voting to stay in a reformed EU will offer "the best of both worlds", he says, and urges campaigners to spread the message,

David Cameron says the UK is "safer" in the EU, because of co-operation between other member states in tackling terrorism and crime. It would be a "complete folly" to give that up, he adds. The PM also sets out why he thinks EU membership makes the UK "stronger".

David Cameron is jabbing his finger around a lot, as he seeks to take apart the arguments for leaving the EU, and warns about the possible trade implications of such a move.

"We are sceptical" of the European Union, David Cameron says - adding that that's why he has embarked on the renegotiation. 

He says he's guaranteed Britain can't be discriminated against in the EU and secured an opt-out from ever-closer union. Bureaucracy will also be cut, he adds, and cites the curbs to migrants' benefits he's negotiated.

He says now is time for the "bigger argument" - about what is right for the future of the UK - adding that the country will be safer and better off by retaining its EU membership.

Taking to the stage to a round of applause, Prime Minister David Cameron takes to the stage - jacketless, without a tie and with his sleeves rolled up - to applause.

"This matters for us so much for our country... and for us as Conservatives," he begins.

David Cameron is about to launch the 'Conservatives In' campaign, which is campaigning for the UK to vote to stay in the EU. Present are Tory ministers, MPs, peers as well as councillors and party supporters.

Speaking at the event, Transport Secretary Patrick McLoughlin tells the assembled crowd "we are about to embark on a debate which is going to be of fundamental importance to our country".

He says he finds the EU frustrating, but adds: "There is no utopia that is going to be there for us in some mythical world that does not exist." It's a point, he says, the remain campaign must make.