Corbyn allies note with interest that both John McDonnell and Momentum chief Jon Lansman attended the launch of a new group called Labour Consensus on Tuesday. The group is a soft-left attempt to unite the far-left of the party with amenable moderates, the likes of Stephen Kinnock and Angela Eagle are involved. Speculation has grown in recent weeks that McDonnell is working on a “succession plan” and has ambitions to lead the party after Corbyn. “He has been attending every event under the sun,” observes a colleague, forging increasingly close links with Momentum in particular. Certainly interesting that the old, revolutionary, grab-the-mace McDonnell has suddenly been replaced by a friendly, cooperative, consensus-seeker…