I travel through Kings Cross every morning, and I literally don't think about the chance of being caught in a terrorist bomb.
I know for a fact that I stand much more chance of being killed at home (in my kitchen) or wrapping my car round a lamp post.
I remember it playing on my mind the day after 7/7, but then real life kicks in and the usual 'everyday' worries and concerns resurface and replace any terrorist fears.
Then again - I lived in London through the IRA campaigns of the 70s. I don't remember fear then, and I feel none now.
I'm more worried about the state of Britney's career.