Earlier reports suggested that Guy Goma was a taxi driver who was called in by mistake when someone shouted the name of his fare, Guy Kewney, in the BBC reception.
However, it now turns out that Goma thought the exercise was part of his interview and did not realise that he would be broadcast live on air.
"Apparently the unflappable Mr Goma assumed that the whole thing was some kind of initiation prank," Kewney said on his blog.
"His own speciality is data cleansing, and (my source inside the Beeb tells me) was a little upset that nobody asked him about his data cleansing expertise. "
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