I’ll let you in on a secret: I love big things. Big holes, big houses, big bridges, big cars. I suspect it has something to do with being very large myself. After spending most of my formative years living in old, low-ceilinged British houses, and developing a hunchback, I now find expansive spaces rather comforting. Which is why I recently paid a visit to the new Elizabeth line (née Crossrail) tunnels near Bond Street, London.