The Tories have pulled ahead in a national poll for the first time in two years. The Ashcroft/ConHome telephone poll will cheer CCHQ, though it’s a slender lead. Ashcroft says:

“one thing I should point out is that the Tory lead is somewhat more slender than it looks: if one fewer interviewee had named the Conservatives the party’s score would have been rounded down to 33 per cent rather than up to 34 per cent, and the lead would be down to one point.”

The psychological impact is far more important than the details though.