The smallest..

If you look closely, you can see two mice arguing over a piece of cheese. This is the smallest public sculpture in London. According to legend “The statue dates back to the building's construction in 1862. Two of the workmen had an argument about which had stolen the other's sandwiches. This caused a fight atop the scaffolding, which led to a life-ending fall. It turned out afterwards that neither man was the guilty party, instead some mice had eaten the food. The remaining workmen left this diminutive sculpture on the building, in their honour.”