April 23 (Reuters) - Kenya's Mary Keitany broke the women's only world record en route to her third London Marathon gold medal on Sunday, finishing in a time of 2:17.01 hours to beat Paula Radcliffe's time of 2:17.42 set in London in 2005. Radcliffe still holds the overall record of 2:15.25, which she set in a mixed gender race at the London Marathon in 2003. The IAAF recognises two marathon world records for women, one for "mixed gender" and the other for "women only".
