I've seen quite a few shots like this of the London underground and wanted to give it a try myself. Quite a bit of PP involved to get the result I wanted (so this is really a mix of photography & PS work). Still is a bit tricky just to get a shot like this without people in it. Tip for anyone else trying this is don’t go to stations with Interconnecting lines (I worked this out after about an hour of people getting in my shots ).

[Khashoggi]

Nice try! I still see some shadows of people, when you remove people in photo shop try to remove the shadows as well.

[mde1970]

Khashoggi - thks for reply. Dont think you can see shadows from people as I have not removed anyone from this shot.

[daacon]

Nice BW conversion.