Metropolitan Police SCO19 Armed response unit- Black uniform
The Specialist Firearms Command (SCO19) is the firearms unit of the Metropolitan Police Service. The Command is responsible for providing a firearms-response capability, assisting the rest of the service which is not routinely armed.
They are full-time units whose members do not perform any other duties. On occasion, they have been referred to as the “blue berets”, as they used to wear these. Today they are more likely to wear either blue baseball caps or combat helmets.