She began her international junior career in cross country running in 2001 , highlighted by 33rd place at the 2003 IAAF World Cross Country Championships .
In December 2012 , Britton became the first woman to successfully defend the European Cross Country Championship .
Britton began Britton 's international junior career in cross country running in 2001 , highlighted by 33rd place at the 2003 IAAF World Cross Country Championships .
In December 2012 , Britton became the first woman to successfully defend the European Cross Country Championship .