Only 5 percent of large U.K. companies say their boards include directors with expertise in information technology or cyber security, even though the vast majority identify hacking and other digital threats as serious risks, a report showed. In the event of a cyber attack, more than half of companies in the FTSE 100 stock index cited contingency, crisis management, or disaster-recovery plans in their annual reports, according to the survey, published Monday by consulting firm Deloitte LLP.