In basic terms: too left for the right, too right for the left. He appears to have pulled the Labour party more centre-right and abandoned a lot of the socialist and soc-dem positions for more neoliberal policies (though people have varying opinions if it’s actually true.) That has made a lot of people unhappy, leading to a surge of Reform UK (the ultra-right party) and the Green Party (the left, environmental focused party). You can see the current trends in this Wikipedia article as well as the other parties in play.
In basic terms: too left for the right, too right for the left. He appears to have pulled the Labour party more centre-right and abandoned a lot of the socialist and soc-dem positions for more neoliberal policies (though people have varying opinions if it’s actually true.) That has made a lot of people unhappy, leading to a surge of Reform UK (the ultra-right party) and the Green Party (the left, environmental focused party). You can see the current trends in this Wikipedia article as well as the other parties in play.