Sonia O'Sullivan has set a new world record, in the second race of her comeback. O'Sullivan was running on the streets of Loughrea, Co. Galway this afternoon, where she covered the five mile distance in a new world best time of 24 minutes, 27 seconds. In her first race back, in the Great North Run in Newcastle last week, she finished fourth over the half-marathon difference. O'Sullivan now heads to Australia to continue her preparation for the Sydney Olympics next summer.