To put the business about booing in context:

When David Dimbleby was announcing future guests first up was the next week, and he mentioned Griffin, which got a good boo. Then he mentioned the following week and Jacqueline Smith's name came up - another boo. Then an announcement that John Sergeant, a former TV journalist who'd made some memorable appearances in Strictly Come Dancing, would be a guest, and everyone cheered - and Dimbleby mutters "this is getting like a pantomime", where that kind of audience participation is traditional. After the first boo it turns into a bit of a joke,