What was the fastest steam train trip in the world, and why DID Isambard Kingdom Brunel have such an odd name? This week’s Answers to Correspondents delves deep into railway lore with help from Ben Le Vay, author of Britain From the Rails (who insists he is not a trainspotter, just very, very interested in trains). As ever, questions from Daily Mail readers are provided by Charles Legge, editor of the Daily Mail’s long-running Answers to Correspondents column.