Asking someone to send you an “engineer” will conjure up all sorts of people who build and fix things. But today’s show is about civil engineers. Professor Robert Mair of the University of Cambridge Engineering Department will explain what are they and what do they do. What’s the difference between a civil engineer and a washing machine engineer? Is it that a civil engineer wears a suit? Maybe not, but we’ll be getting the answer and you’ll hear about the civil engineering in “Crossrail”, a £15 billion project to a build train route from Reading, tunnel across London and then on to Essex and Kent. Work started five years ago and the first trains will run in 2019.