This really does come under the heading 'unsubstantiated rumour' and I almost hesitate to pass it on, but word on the street is that there will be a very interesting poll in tomorrow's Independent. If the rumour is to be believed, it will show a 13 point Tory lead. Yes, you read that right. Tories on 40% and Labour on 27%.
UPDATE: Apparently it's true! My only caveat is that this is done by Communicate Research, whose polls do tend to swing rather violently.
UPDATE: LibDems are on 18%. Thanks BJ!