After winning the 1500 m British Universities title, she represented Great Britain at the 2017 Universiade and placed fifth in the final. The winter, she travelled to train in Iten in Kenya. Courtney was chosen to represent Wales at the 2018 Commonwealth Games and she came away with the bronze medal in a personal best time of 4:03.44 minutes, beaten only by Caster Semenya and Beatrice Chepkoech.