Despite the title, this isn���t a Valentine���s-themed post ���but if you happen to be single, it���ll probably make you grateful for some ofthe advantages of 21st-century life. Last weekend, I went to a studyday at City Lit that was inspired by Virginia Nicolson���s Singled Out, a booktelling some of the stories of the ���surplus women��� after the First World War.Although this was a period when