Cameron has pledged to hold an up-down referendum on UK exit from the EU but only on the condition he wins the next election and even then, only on his promise that he can get an overhaul of EU rules for benefit of the UK.

Promise or a lie? I suggest the latter.

"Point of No Return" Warning From Merkel

And without using the word lie, German Chancellor Angela Merkel warned UK could leave EU if David Cameron insists on migrant quotas.

Germany would be prepared to accept that Britain will have to leave the European Union if David Cameron insists on restricting the number of immigrants from the bloc who can live and work in the UK.

Mr Cameron's bid to curb levels of migration from the EU is taking Britain to a "point of no return", according to Der Spiegel.

Mr Cameron has said that he will reform Britain's relationship with the EU before holding an in-out referendum in 2017.