David Longmuir, head of equity sales at OAO Sberbank’s London unit, agreed to step down after being accused of referring to a colleague as “Ms. Cokehead,” according to two people with knowledge of the matter. Colleagues on the equity sales desk, all men, created a hostile work environment and displayed “a demeaning and offensive attitude to women,” Svetlana Lokhova alleged in documents from her U.K. employment tribunal claim against Sberbank CIB. Lokhova took a leave of absence in January 2012 and hasn’t returned since. Lokhova accused Longmuir of sending e-mails to clients saying they were “awaiting arriving of Ms. Cokehead,” and “they’ve hired mad Svetlana to do equity sales,” according to her claim. [Bloomberg]