Who is SAXON?

On February 21 Simm was seen in the Wales Millennium Centre in Cardiff playing the newly elected British Prime Minister Mr. Saxon, in scenes being shot for the final two episodes of the 2007 series of Doctor Who.Whether he is also the Master as previously stated is still a possibility, and could explain a lot of the focus that has been put towards Mr Saxon as a character. I'd say that if Simm = Saxon then he's DEFINITELY the Master, because there's been all this Mr Saxon rubbish for months... And I bet you a tenner he's going to be a beardless Master too "to bring him up to date".