ParalympicsGB have ended the cycling track competition top of the medals table.
The final day of action at the Rio Olympic Velodrome saw GB pick up two golds, a silver and a bronze to take their overall haul from the last four days to eight golds, two silvers and two bronzes.
China were a distant second in the velodrome with a final tally of three golds, two silvers and two bronzes.
The final day was capped off with a dominant performance in the mixed C1-5 750m team sprint, as Jon-Allan Butterworth, Jody Cundy and Louis Rolfe eased past their Chinese rivals with a new world-record time of 48.635s.
Turnham and pilot Corrine Hall had set a Paralympic record in the heat and stormed to gold in the final race, with a finish time more than three seconds ahead of New Zealand's world-record holder Emma Foy.