Hubbard competed as a man before transitioning at the age of 35. The IOC is now reviewing its policy over transgender athletes

Leading sporting organisations are reviewing their policy on transgender athletes amid concerns that men who transition to become women could receive an unfair advantage in female competitions. The International Olympic Committee, World Rugby, the Rugby Football Union and British Cycling are among those carrying out reviews.

Existing IOC rules allow trans women to take part in female sport if they have reduced testosterone levels, even if they still have male genitalia. Critics of that policy, including some feminist groups, say that trans athletes will have a significant advantage if they developed male bodies before they transitioned to becoming women.

The IOC has a “consensus group” working on the issue and aims to provide updated guidelines this year. The issue is separate to the debate on