I've decided to enter a photo competition, which is very unlike me, but I'd like to think I have some chance. I've got until the 13th of this month, so please let me know in comments or on Flickr, but the brief is as follows:

If you had to illustrate a book about the London Underground what photo would you use? Have you taken a photo that really shouts out Tube or the experience of travelling on it?

I've only got three good enough photos that I feel convey this:

Please let me know which one you like, as I can only pick two at most. I can't really choose as these three photos all mean something to me in some way, so I'd like to know what you guys think. If there are other photographs that I've taken that you think I should enter that fit the brief, then please let me know.

Thanks.

_{homepage | flickr | last.fm | postcrossing}