I doubt that you would call the Labour governments of the '60's and '70's "socialist" if you actually knew anything about them. That far-left criticism of Labour governments then is basically the same as it is now (modified for changed circumstances, of course) is quite amusing. Even funnier is the consistent refusal on the far-left to remember the criticisms of past Labour governments that were made by of past generations of hard-lefties.
Quite. Remember which party made the decision to a) go for The Bomb, b) not to scrap Polaris and c) order Trident.