In the City's first case of homosexual harrassment, the former global head of equity trading at HSBC is suing the investment bank for 'unfair dismissal on grounds of sexual orientation' after it fired him for 'gross personal misconduct'...Peter Lewis, 43, was dismissed in February after two male colleagues made serious complaints of sexual harassment against him...A spokesman for HSBC said: 'Peter Lewis was dismissed for gross personal misconduct after a lengthy disciplinary proceeding...'