Buttersea powerstation

as seen from Pimlico Street (i think). had a couple of hours before the flight and spent them on a walk along the Themes from Tate Britain towards Chelsea Bridge. Took quite few shots of the Buttersea powedstaion, such a photogenic object. but then on the way back to the hotel saw the station through the gates on Pimlico street/road, what a view!
when i was taking this picture next to me stopped a man with a pocket size note-pad, page devided into three columns and started logging train numbers as they passed...