Discovering Westminster

About six months ago I took a job in Westminster, just around the corner from the Abbey where Kate and Wills got hitched. Since then it's become more of a stomping ground for me and I've enjoyed exploring the area and discovering new places and details. Westminster has to be one of London's busiest tube stops and it's always a bit of a hassle negotiating through the hordes of tourists and commuters in an effort to be on time, I am always late for work.
I've noticed the Taxi lamp a couple of times but I never really considered the reason for it being there until, walking to the tube of an evening, I saw it flashing and then, the penny dropped. It's a way for the police that guard the Houses of Parliament to signal to passing black cabs that an MP or Lord needs a taxi. The taxi is then allowed through the barriers into the separate lane of traffic that goes straight up to the Houses of Parliament. It actually made me stop in my tracks. Amazing. That is all.