 Complete the following phrase:  Specialising in the short sprints and sprint relays in her early career, and despite being part of the Great Britain 4 x 100 metres relay team that took gold at the 2014 European Athletics Championships, a move on her coaches suggestion to the longer 400 sprint and relay in her later career led to her most significant individual and relay successes. In the 4 x 400 metres relay, she won a World Championship bronze medal in 2015, while in 2016 an individual bronze in the 400 metres, and relay gold in the 4 x 400 metres relay at the 