That Poll is an outlier in terms of Tory Vote
Look at where the Tory vote is in comparison to recent trends (way higher), mid-summer is the last time they were so high
Look at where the gains have come from (Lib Dems) - again, no way have they dropped that much imo
For the Tories to have effetively taken over half of the LibDems votes nationwide in the last month is beyond any reality I would have thought
Look at where their gain has come from (Libdems)