Former Belgian prime minister and Liberal Democrat leader in the European Parliament Guy Verhofstadt has accused David Cameron of "playing with fire" over Europe:
By holding out the prospect of renegotiating the terms of Britain's membership of the EU and subjecting it to a referendum, David Cameron is playing with fire.
He can control neither the timing nor the outcome of the negotiations and in so doing is raising false expectations that can never be met ,,,
His speech was full of inconsistencies, displaying a degree of ignorance about how the EU works.
To the surprise of many Lib Dems, Nick Clegg appears to have played down the importance of the Coalition's divide on an in-out referendum.
Business leaders in Davos are worried about the Prime Minister's pledge to put Britain's membership of the European Union to a referendum.
With some in France keen to "roll out the red carpet" for a British exit, Germans favouring decentralisation welcome EU renegotiation talks.