I disagree, both the left and the right have gained ground at the expense of the centre. Labour may have won a supermajority but they did so with fewer votes than in 2019 when they lost to the Conservatives.
The biggest reason they did so well this time around was because the Conservative vote was split by the far right Reform party. Reform won barely any seats but they had the third highest turnout of any party.
I disagree, both the left and the right have gained ground at the expense of the centre. Labour may have won a supermajority but they did so with fewer votes than in 2019 when they lost to the Conservatives.
The biggest reason they did so well this time around was because the Conservative vote was split by the far right Reform party. Reform won barely any seats but they had the third highest turnout of any party.