London, May 26. (Adnkronos) – Problems with British Airways’ computer systems have caused the cancellation of dozens of direct or arriving flights at London’s Heathrow airport. Yesterday there were more than 50 canceled departing flights and over 20 arriving ones. “It was difficult to solve the problem,” admitted the company. The system was back up and running at 11.30pm yesterday, but “there may still be intermittent problems”.