Directors at London-listed blue-chip companies earned 21 percent more in the 2013/14 financial year thanks to a steep rise in long-term incentives, a report showed on Monday. The median annual earnings for directors at FTSE 100 companies was 2.43 million pounds ($3.9 million), with chief executives at 3.34 million, employment research firm Incomes Data Services (IDS), part of Thomson Reuters, said. When such incentives pay out, they can pay out substantial sums, giving a significant boost to directors’ earnings,” said Steve Tatton, editor of the IDS report.