Final answer:
The Bow Street Runners, recognized as London's first professional police force, were established by b. Henry Fielding in 1749.
Step-by-step explanation:
The Bow Street Runners were established by Henry Fielding in the mid-18th century. They are often considered to be London's first professional police force. Henry Fielding was a magistrate at Bow Street Court in London, and with the help of his brother John, he created this group in 1749 to tackle the increasing crime in the city. The Bow Street Runners were a significant development in the history of law enforcement, laying the groundwork for modern policing, though it was Sir Robert Peel who later established the Metropolitan Police Service in 1829, which is sometimes confused with the work of the Bow Street Runners.