"As far as I know, the AWL is unique on the British left in allowing members with a minority viewpoint pretty much unrestricted access to its press, website etc."
It is good to allow different views to be debated out and access to the paper, website and other publications to do so. I think the cpgb may also. PR would but this has not been tested by there being a major disagreement. Debate also needs however to be relatively fraternal- until recently the AWL was or at least many of its memebrs were extremely rude if not vitriolic to those who disagree with it- this does seem to have toned down recently somewhat however and that's as a good thing.