Red Wall Leave voters (whether they voted Tory or Labour in 2019) showed their vote could change the result of an election IF they voted en masse when they voted Leave in the 2016 Referendum.

But many of them hold similar views that are left-of-centre on economics and right-of-centre on social (law and order, immigration etc).

The old gang RELY upon them being divided between red and blue so their power is divided. But united they would be a formidible force (and a lot of current non-voters in their seats would be activated to tip the balance).