On 24 May 2015 Dina broke the British 100m record with a time of 11.02 seconds. On 25 July 2015 she became the first ever British woman to run the 100m in under 11 seconds. On 28 August 2015 she set a new British record of 22.07 seconds in the 200m, finishing fifth at the World Athletics Championship in Beijing. Dina was part of the Team GB 4x100m relay team at the Rio Olympics winning the Bronze medal. In August 2018 at the European Championships, Dina took home three Gold medals, the 100m and 200m finals, and the 4x100m relay Gold.