For too long Labour took the piss out of the working classes in the U.K. and treated them with champagne socialist disdain
I live in a constituency that had never been Conservative, always Labour, and in rhe 2019 GE it went to the Conservatives (narrowly by around 800 votes but still a win for them). Central government seems to forget that people often vote on local basis and on local issues especially if they feel far removed from London-centric policies.
Literally all the Conservative candidate had to do to win was show up. The Labour MP was never seen, he relied on the fact it had "always" been a red constituency and so he rarely visited, rarely was out in the community, and rarely engaged with local people. The incoming Labour candidate followed his example, presuming they would win by default. The Conservative candidate odious little shit that he is was out knocking on doors, asking people what they want to see for the area, making promises, getting out in the community. Visibility wins votes, complacency doesn't.