I am a student in wales and only have s4c and so the program is miles behind the channel 4 show...
but the woman in the seat asked the audience what she should do and one bloke stood up and said that she should deal and take a gamble (obviously confused) , noel 'sent-off' this guy with a red card (which he happened to have on him) and marched him off the set...
As far as I'm aware... from looking on the DOND website and from my familiarity with Studio filming, I don't think it was pre-arranged. The Red and Yellow Cards had appeared in his pocket before this episode for people who were taking the seal off before Noel said they could.