Watching the paper review there was a mention of Momentum quoting Roy Hattersley. The comment by one of the reviewers was interesting.
This is a ridiculous story, run on repeat by the Observer and by other papers who seem really weirdly obsessed by Labour's process and seem to see the Labour Party and Momentum, which is the grass roots group of Labour and Corbyn leadership supporters, as somehow infiltrating the Party [laughter at this point]. I think it, you know, I think they are just struggling to understand basic concepts of democracy which is that the Labour Party now has over half a million members. They are very enthusiastic, they canvassed and campaigned during the election which I think led to that success, for the Labour Party in that election. And, you know, if the right of the party doesn't like the candidates that are being democratically elected there is nothing to stop the right of the party getting people to join Labour and do its own canvassing. They really need to ask themselves why that isn't happening because the reason it's not happening is because they are not able to generate any kind of appeal for the policies that they have. So it seems like instead of actually addressing that issue they have decided to become obsessed with democratic processes that are happening across the country with the party now.