It comes as no suprise then that the latest You Gov poll in this morning's Times puts the two main parties neck and neck in these seats
The poll shows that the switch of voters from Labour to the Tories is about 1.5 to 2 points higher in the battleground seats than nationally. That might be worth an extra 20 MPs to the Conservatives, smaller than many in the party would hope after the big spending on these targets. It might be enough only to take the Tories to the threshold of the 326 seats they need for a bare overall majority in the Commons
As Mike Smithson says
All this is going to provide real heart for Labour supporters and add to the jitters at Cameron towers. It’s also going to make the coming campaign that bit more exciting.