In central London there is what is called the square mile. Bollards and the like are marked with this mark. Rather nicer than the old black/grey one elsewhere in London.
© 2011 woollypigs
The square mile
This building is in Greenwich, London. It is one of these patterns that you can’t stop looking at no matter how much it mess up …
Newer: Isle of dogs
Pretty much across town from me, but easy to spot no matter where you are in London.