They've always had Socialist roots, however they've never been Trotskyist and/or revolutionary(despite the efforts of various organisations with those ideologies to try and associate themselves with them).(Original post by mojojojo101)
I don't think either of those parties are extremist, but thats a matter of opinion. My point is that it demonstrates just how far they have come from their so called socialist routes that when an actual socialist party is mentioned they run around screaming their heads off to discredit them as quickly as possible.
Frankly I don't expect the Labour party to be cosy bed fellows with actual socialists, I am just surprised that they are so willing to demonize and exclude left wing opinions from their own dialogue.
But we haven't even met!