From an interesting Guardian/Observer article on keeping reality show results secret, two points, first questioning the veracity of bookmakers' PR claims, and secondly, the ethics of accepting bets months after the race has been won or lost.
on the day before the final, bookmakers Ladbrokes claimed that dozens of new gambling accounts with links to BBC staff had been opened just before the latest series launched in August. However, it is understood that Ladbrokes has yet to provide any evidence of this allegation
BBC executives are now considering writing to the Association of British Bookmakers to question the practice of taking bets on recorded programmes