Green was selected to run as part of the British women's team in the 2000 IAAF World Half Marathon Championships along with Paula Radcliffe, Marian Sutton, Sue Reinsford and Sarah Young-Wilkinson. In the build-up to the race she won the Bristol Half Marathon in a personal best time, 1:13:28, a minute ahead of Sue Reinsford who was second. Ultimately in the Mexican heat, only herself, Radcliffe, and Young-Wilkinson competed, with Radcliffe winning the race and the team of three finishing sixth.