A month later Cox was selected for the Great Britain athletics team to compete at the 2015 IPC Athletics World Championships in Doha , where she entered the T37 100m and 200m sprints . In the heats leading up to the final of the 100m sprint , Cox posted a time of 13.59 s to beat the world record set by France 's Mandy Francois-Elie . Later that day she ran in the 100m T37 final , taking the gold medal in a time of 13:60 , beating team mate Georgina Hermitage into second place . Her final event of the championship , the T37 200m sprint , ended in controversy after she missed registration by a minute and was disqualified from the race . In June 2016 , after securing a place at the 2016 Summer Paralympics as a T37 athlete , Cox was reclassified as a T38 category athlete , a classification for less-disabled athletes . This threw her hopes to race at Rio into jeopardy as Britain already fielded two other athletes , Sophie Hahn and Olivia Breen , who had posted faster times as T38 sprinters . Despite the classification change , Cox was selected for the Rio Paralympics in July 2016 . At the Games she took a gold in the T38 400m , a silver in the T35-38 4x100m relay and a bronze in the T38 100m . She also set a new world record of 1:00.71 to take the gold medal in the T38 400m . Cox was subsequently selected as the flag-bearer for the British team at the closing ceremony
closing ceremony
2016 Summer Paralympics closing ceremony
Kadeena Cox