Both Sit-up and Wikipedia (unreliable I know!) says that Peter Simon started his TV career at the age of 12 as a presenter of Junior Showtime which ran from 1969 to 1974. For the sake of convenience let's assume that he was 12 years old in 1972, therefore he would have been 32 when Run the Risk started in 1992 (always thought that he was at least in his mid-30s when he did that), and 52 today. Perhaps not as old as my guess of 60 (he makes himself out to be ancient just to sell products!) but more like fiftysomething than fortysomething; his age is most likely to be in the range of 50 to 55.
Oh, and Prof Brian Cox may be in his forties but he doesn't look that much older than Peter Simon does in that picture :wink: