This week meet Imogen Tazzyman, Executive Creative Director at McCann Manchester, a 370-strong marketing and communications agency.A few months ago, Imogen emailed me about the lack of diversity in the top roles in advertising. Despite the diversity and inclusion initiatives that many companies have rolled out over the past few years, the default leaders still tend to be white, male, straight and able-bodied.The truth is that that profile doesn’t represent the broad demographic of consumers i...