People who stop right in front of the barrier in the tube/train station, while rummaging for their ticket. Either have your ticket ready before you get to the barrier, or at least have the good grace to stand to one side while you're rummaging for it. Gah!
People who step off the escalator and just stop. Not only inconsiderate but really pretty dangerous.
People who walk through the door you're politely holding open for them and don't even acknowledge your existence, let alone say thank you.
Cyclists who cycle through red lights and then yell at you for having the cheek to be in their way as you're crossing the road on the green man.
Hmmmm, you'd never guess I commute into London for work, would you?!
