If anybody has a record of stretching pluralism beyond party boundaries, it is surely Ken Livingstone.
Today, he is taking the red-green thing quite far:
"If the Greens were to pick up a few seats from Labour at the General Election, by god that would put the fear of God up them"
A couple of enthusiastic shouts and some clapping at this. (We do have Sian Berry in the next session - and quite a broad audience).
"Applause - at a Fabian event", says Paul Hilder of Avaaz from the Chair.
"Get their names! Expel them!", shouts Ken.
Lots more about this conference on twitter - hashtag #ccc