Yes it is definately the same person, I watched the episode of 'cash in the celebrity attic again on the BBC Iplayer and, if you also watch the episode of Britains got Talent again on the ITV Iplayer you will see that when they show him in his normal day job he is even wearing the same T Shirt!

Did anyone watch cash in the celebrity attic tonight? at 5.15 - 6.00pm BBC2 it was an addition with Anne Diamond and Stavros was one of the bidders in the auction, he bid on an exercise machine, very near the end of the auction and he was the winning bidder, I dont know if this was filmed before he auditioned for Britains got tallent or not.