Morris was a latecomer to cycling, only taking up the sport while studying medicine at the University of Southampton.

[1] She had a breakout year in 2022, earning three medals at the British National Track Championships before going on to represent Wales at the 2022 Commonwealth Games in Birmingham.

[2] Morris earned her first global medal when part of the team pursuit squad that took silver at the UCI Track World Championships in October 2022.

[3] She won two golds at the 2024 UCI Track Cycling World Championships in Ballerup, Denmark, taking both the individual[4][5] and team pursuit titles.

[8][9] On February 22, 2025, Morris once again beat her 4000 metre individual pursuit world record, with a new time of 4:24.060, at the national championships.