They have called it Labour -12, Con +5 but compare:
what has just been announced.
The Con share of the vote is down from 22.5% to 21.4%.
Am I missing something? Why are the professors calling this a 8pc swing to the Tories?
UPDATE: What I think they have done is put all the BNP and UKIP gains into the Tory pot
UPDATE 2: There were significant boundary changes, apparently (see Nate Silver). BBC still extrapolating like lunatics on this subject.