I'd love to read a good 'Bevan as leader' TL. It's also nice to see 'first name politics' happen long before Tony and Gordon...
Bevan is a wonderfully interesting person. I think his pre-mature death is one of the great tragedies for the Labour Party, he would have been the natural successor to Gaitskell had his health been up to it (obviously, he would have been leader for a time anyway) and would easily have beaten aside a challenge from George Brown and a token one from the left (Zilliacus probably) to end up with an even more secure position than Wilson did.
I may get around to something like this in a year or so.
That may be true, but the impetus for the formation of the CND in 1957 and extra-parliamentary mobilisation against the nuclear deterrent was exactly Bevan's shift to a more moderate position. If Bevan is leader and forced into a position of pragmatism then there is still going to be the same sense of betrayal and the emergence of unilateralism as a popular political issue.
Oh indeed, but CND was only able to get the toe-hold it did in the PLP because the Bevanites assumed that Nye would be supportive of it. The "betrayal" when he became Shadow Foreign Secretary was great, but he was already ailing by then, so most of them let it slide. Had he been able to shunt most of the PLP towards the centre ground, you're talking of only around a dozen MPs who are going to be against the deterrent, as opposed to the fifty or so of OTL.
What could happen is CND becoming a more pluralistic movement, rather than the Communist Front that it was perceived to be at the time. Bevan would be able to get a tighter control on the Trade Union leadership, so I doubt that the big leftward shift seen in 1959 would occur on quite the same level.