If there’s a train geek in your life who deserves a Valentine’s gift with a difference, then how about… a poster warning of leaves on the line? Yup, a late 1970s Southern Region poster about slippery tracks can be yours from Frontispiece at Canary Wharf for the greater part of a couple of hundred quid.
(If you wanted to impress me, of course, you could buy me a set of bus destination blinds like I’ve seen in a couple of places. There’s a great one knocking around which looks like it’s come off an old 177. Please?)