On September 29, 1829, the Metropolitan Police Act was passed by British Parliament, allowing Sir Robert Peel, the then home secretary, to found the London Metropolitan Police. These police are often referred to as 'Bobbies' or 'Peelers' after Sir Robert (Bobby) Peel, who introduced the Police Act. They became a model for the police forces in most countries, such as the United States, and most of the British Empire. Bobbies can still be found in many parts of the Commonwealth of Nations. The primary role of the police in Britain was keeping the Queen's Peace, which continues into the present day.
I also found 'historical' records (from a long time ago, in a galaxy far far away) that show that one of the Jedi High Council was in fact a 'Bobby': he is none other than Ki-Adi-Mundi from "Star Wars Episode I: The Phantom Menace", a Jedi knight from the largely unspoiled paradise world of Cerea. Ki-Adi-Mundi's high-domed head holds a complex binary brain which is supported by a second heart. To protect the brain, he would have to don a Bobby's helmet and that's probably how it originated :) just ki–dding, of course!
This 1/6 scale 12-inch Ki-Adi-Mundi poseable figure was released by Hasbro in May 2002 as part of their Star Wars Saga Action Collection 12-inch figure series released during "Star Wars Episode II: Attack of the Clones"
His surcoat is adapted from ancient Cerean garb and Cerean cuffs extend from the sleeves to hide his hands