A level playing field

No-one knew that she wasn't just competing against other riders, but her own body - the hormone blockers she'd been taking since 17 had reduced her testosterone levels to below those of most women.

"I was losing strength and losing speed on tracks even though I was training and riding really hard," she says. "It was demoralising - you're trying to push yourself as far as you can but you're going slower and slower."

But she didn't want to come out as transgender, fearing hateful comments in a male-dominated sport.