I was under the impression there were a few people they used. You can tell that it's not always the same person by the differing driving styles throughout the series. Maybe it's down to race commitments or something but I'd like to bet that Plato is one of them. I'm gueesing that the only reason there is a 'stig' (ie. hemleted driver) is because they are contracted to another channel
such as channel 5
Oh yeah, by the way..... I HATE TIFF NEEDELL!!