Yesterday was not a good one for Cameron. On top of the immigrant stats, which showed a substantial rise in EU immigration, came Angela proclaiming that Dave's Big Idea of renegotiating the UK's place in Europe was a no-go. Undoubtedly there will be voters who despite the evidence were prepared to give Cameron the benefit of superior knowledge - that he must have better advice than bloggers and pundits - whose support Merkel has just brought down in flames. Very well, they will reason, if it's really in or out then I'll go with UKIP - I least I know they won't lie about a quick referendum.
Events in Ukraine can also do nothing but highlight the EU's failures and inadequacies, and if Miliband seeks to stem the slow bleed of Labour supporters to UKIP by backing a referendum it won't be Cameron's referendum. All in all, this is news beyond the government's powers of news management; there is nothing I can see on the horizon that could boost Cameron's position on Europe with the voters.