Our choice of venue is less symbolic than practical. On a moody August morning, I meet the Scottish actor Jack Lowden in front of the Scottish Parliament, a severe postmodernist building, where in a few hours he’s due back to talk about access to the arts with the country’s presiding officer at Edinburgh’s Festival of Politics. It’s the buttoned-up stepcousin to the more famous Fringe Festival, taking over centuries-old buildings elsewhere in the city...