Duel is an ITV game show based on a format by Francophone production company French TV, hosted by Nick Hancock, broadcast on Saturday evenings.
Each contestant is given two 'Accelerators' (similar to the 'press' in the American version of the show), imposing on their opponent a seven-second time limit; any answers covered after these seven seconds are automatically locked in.
For the first four shows of the series, a back-to-back 'Duel' victory offered the contestant a choice to leave with their winnings or to play Cash or Chips.
The first ever Duel jackpot winner was Robert, a social worker from Blackpool in Lancashire, who correctly identified that the US Masters is the only major golf tournament to be held at the same venue each year.
He won the £470,000 jackpot that had built up since the start of the series, and also took home his accumulated accelerator wins of £12,500, giving him a total of £482,500.
A week later, on the final show of the series, firefighter James won the third Duel jackpot of £166,000, plus his accelerator win of £20,000; a total of £186,000.