There’s long been a kinship between poets and pints, says Jean Sprackland. It’s particularly strong in her case: she grew up in Burton-on-Trent, a town synonymous with brewing, and had a summer job in the maltings. In Gone for a Burton, on Radio 4 earlier this week, she led a lyrical tour of the trade and the town. In the process, she learnt a new explanation of the phrase she’s borrowed for her programme’s title…