Peter
I am sure you know this, but Trotsky believed that communism could only succeed if there was worldwide revolution.
Stalin, on the other hand, believed that you could enforce it at a national level. Nothing whatever, no doubt, to do with his lust for power and repression in the Soviet Union :-)
Long-Bailey's colleague was spotted at a labour event wearing a t-shirt glorifying Trotsky's assassination. The excuse given was: "he's young" - which sort of goes against the idea championed supposedly by Labour that young people are responsible political adults (which I believe they are largely)