Back in 2008, when Nicola Coughlan was at drama school, a guy in her class swaggered over and, with all the brimming confidence of young men in the noughties, asked her, “Do the Irish think the English are really cool?” Coughlan, born in Galway, mimes processing the question. “Well,” she said, “it’s quite complicated. Like, there’s a lot of history there, between the two countries. Like, there’s a lot going on.” The Guardian’s journalism is independent. We will earn a commission if you buy something through an affiliate link. Learn more. Today, people are more knowledgable about the history of...