An IBM manager who was victimised by her four female bosses after she warned them that making female staff take work calls on Saturdays amounted to sex discrimination has won £20,000 in damages. Dawn Davidsen, 54, from Surrey, repeatedly told her superiors that the computer giant could face legal action from workers due to bullying, harassment and the scheduling of calls on weekends and days off. She said women could claim this was sex discrimination as they were more likely to have children to care for. But rather than investigate her claims, a tribunal heard the 54-year-old whistleblower was branded a 'mother hen' who had 'gone native' by female managers who then targeted her for raising concerns.