The British runner Paula Radcliffe has been reinstated as the holder of the women's world marathon record at two hours 15 minutes and 25 seconds overturning a controversial decision by the IAAF not to recognise the time.
In September the sport's ruling body voted to bring in rules from January next year by which only records set in women-only races would be recognised.
Radcliffe's record of 2 hours 15 minutes and 25 seconds was set in a mixed field in the 2003 London Marathon, a time which the IAAF said would be reclassified as a "world best", with her time of 2 hours 17 minutes and 42 seconds set in a women's-only field in London in 2005 becoming the world record.
However, the IAAF changed that decision at their council meeting in Monaco this week.
In theory that makes it harder for any woman to now break Radcliffe's record, although the Briton has always denied receiving assistance from the male runners in 2003.