Here's a new poll of marginal constituencies by YouGov / Channel 4. On the whole, I guess the Tories will be pleased with it. They're 7 points ahead of Labour (up 2 from a poll in October), and Cameron has a hefty lead on the question of who's the best leader for the future. But there are some below-headline findings that may give them some small concern. Brown is still regarded as a better "crisis leader", for instance (although, it should be said, Cameron is catching up with him). And a clear majority think Cameron is "talking down the economy" for political advantage. Still, overall, it makes much cheerier reading for CCHQ than for Number 10.