He said: "For the past couple of years I've been visiting each Tube station on the network and taking photos of the exteriors and now that I've almost finished (just some of the Eastern Central line stations to go) I was wondering what to do with the photos. To pass away a boring Friday afternoon, I knocked up the attached picture quiz to circulate around the office. Only one person got full marks but not many people here are as fanatical about the Underground as your readers who I am sure could do better."
Mmm, I wouldn't say we're fanatical - well not all of us, but they're certainly a challenge and too be honest I only got about three of them.
He has given some pretty helpful clues, but I think you can manage without them. All I'll say is there are 12 stations in total, one for each Underground line. 5 stations are in zone 1. 6 stations are in zone 2. 1 station is in zone 3. 1 station is in zone 5.
There are no prizes, just the satisfaction of seeing how many of them you can get. Try not to look at the person or people before you when making your guesses in the comments below. I'll put up the answers next week:
Enjoy and thanks again to IanD for devising the quiz.