What is it about using trains that makes so many of us want to take pictures of our fellow passengers? Perhaps its because they are one of those few ocassions we find ourselves cooped up with strangers, and you can't help but start observing them.
I suspect that a lot of people will look at this and think 'so what?', but for me it seems like such a 'typical' scene from the London Underground that it does a fairly good job of representing them all for me, so I rather like it.
matt