Something extraordinary is happening with the opinion polls. They are consistently showing that in the Labour heartlands, support for the party has halved in 2019 alone.
Across the country, support for the Conservatives has fallen a little, but not to anything like the extent as Labour.
There is no single beneficiary of the collapse in support for Labour. Some of those percentage points have gone to the Brexit Party, others to the Liberal Democrats, and the smaller parties have benefited to an extent as well.
Under the ‘first past the post’ system, this makes the outcome very difficult to predict in many seats.
In this week’s podcast, Marcus Stead and Greg Lance-Watkins try to make sense of the polls.