At the end of 2015 Hermitage represented Great Britain at the IPC Athletics World Championships in Doha. There she entered the T37 100m and 400m sprints. In the heats for the 100m she recorded a personal best of 13.79, finishing second to team mate Kadeena Cox who set a new world record. In the finals the result was the same, Hermitage came second to Cox to win silver, her first major international medal. Three days later Hermitage competed in her favoured 400m event. Her time of 1:02.01 was an improvement of her own world record, beating the World Champion, France's Mandy Francois-Elie, into second place.