I got a new lens today, a Lensbaby Spark :)

Rather than have the entire frame in focus it has one "sweet spot" that you move around the scene to choose what's in focus, by squeezing and pinching the edge of the lens itself.

An awful lot of fun, a very different shooting experience and very unique result.

In the end I found that focusing on one place and waiting someone to walk into it was the best tactic. I ended up watching this cleaner doing his rounds in the station and it was interesting that people just ignored him and moved around him like he wasn't there.