2 enemies in Assassin's Creed Syndicate.
Blighters
The Blighters are the Templar-run gang that controls London in 1868 and the enemy you fight in almost every street, stronghold and gang war in Syndicate. Maxwell Roth built the gang for Crawford Starrick, and a Templar lieutenant runs each of the seven boroughs.
Metropolitan Police
The Metropolitan Police are London's officers, based at Scotland Yard in The Strand. They react to the crimes you commit in the street, but through Frederick Abberline they are also allies who want the Blighters arrested.