> There is no reasonable definition of "the Left" that includes the British Labour party.
https://en.wikipedia.org/wiki/Labour_Party_(UK)
> Labour, is one of the two main political parties in the United Kingdom, along with the Conservative Party. It sits on the centre-left of the left–right political spectrum
Centre-left doesn’t mean the Left. It just means it’s to the left of the other centrist party (Tories). Just because they lean left doesn’t mean they are the Left, Radical Left, Commies etc