More than a quarter of high-potential leaders have a high risk of derailing, particularly those who are not self-aware and who greatly over-state their abilities.   These leaders are six times more likely to be rated as a derailment risk than those with accurate self-awareness, suggests research. Some 26 per cent of executives identified by their bosses as being high-potential leaders are also seen as having a high risk of career derailment, according to a study from global leadership and talent consultancy, Korn Ferry. The study, based on Korn Ferry Institute analysis...