Dear Mr Tourist..

I know there's a lot to learn about London, and especially the Tower and Tower Bridge, but if you're walking across the bridge approach road in the gloom of the evening rush hour, do you think you could actually take your nose out of the guide-book before stepping into the road in front of me? I wouldn't want you to get a bad impression of Britain, but I don't honestly feel inclined to apologise for swearing at you.....