 Complete the following phrase:  She reduced her office work to part-time in January 2017 before turning fully professional as a runner at age 31 in March. The change proved successful as she placed 16th in the elite race of the 2017 London Marathon, setting a personal best of 2:30:42 and gaining selection for the 2017 World Championships in Athletics as Britains third fastest woman behind Charlotte Purdue and Alyson Dixon. At the 