I just found this wonderful video of people commuting to and from Waterloo Station. There are many great shots of the more mundane elements of commuting from people waiting for their train to commuters touching in to them finding a seat (if they're lucky). However, the highlight for me are some the shots of the buildings you can see from the train including the ever popular Shard and Battersea Power Station among others.
Update 24-04-2012: Just found out this video was created by Iris Wu. You can see more of her work on her website: http://iris-manwu.com.