No U-turn over false starts

A leading athletics official has warned against making any knee-jerk response to Usain Bolt’s disqualification from the World Championships 100m final. Bolt left the blocks early, leading to talk that the sport’s governing body, the IAAF, could amend the false-start rule it introduced in 2010. But its vice-president Bob Hersh countered: “It would be a mistake to quickly reverse the decision.”