Clive Bull is Leading Britain's Conversation.
28 April 2016, 11:53
This is what happened when Ken Livingstone's live interview with James O'Brien was interrupted by an angry Labour MP confronting for him over comments on Israel.
Ken was in the middle of a phone interview with James, denying there is an anti-Semitism problem in the Labour party when he suddenly said: "I've got a violent MP threatening me."
Then the line went quiet, before an argument broke out - audible in the background of the video above.
The word "Hitler" can be heard. It's since emerged that Mann called Ken "a disgusting Nazi apologist" and a "racist" in the course of the confrontation - you can the angriest moments in the video above.
Mann continued his rant: "You're a disgusting racist, you're rewriting history.
"A Nazi apologist. A Nazi apologist. You're a disgusting Nazi apologist, Livingstone."
"Are you all right Ken?" asked James. "I'm going to stay with this just to make sure that Ken is alright."
The line eventually went dead, but not before Ken called Mann "over the top".
Mr Livingstone has since been suspended by the Labour Party.
Shelagh Fogarty spoke to John Mann soon after the row and he defended himself from claims he had "ambushed" Ken: