Tancock triumphed in the 100metres backstroke to add to his 50m gold. Evening Standard Sport columnist dominated from the off and touched in 53.59sec, which was 0.84sec ahead of runner-up, Daniel Bell of New Zealand Tancock, the world 50m backstroke champion, has now won three gold medals over two Games and owns five medals in total so far with the 4x100m medley relay to come.