Mayfair is a place in London, England in the City of Westminster, named after the fortnight-long May Fair that took place there from 1686 until its was banned in that location in 1764. Prior to 1686, the May Fair was held in the Haymarket[?], and after 1764, it moved to Fair Field in Bow.
... Intelligence Service[?] (SIE)
Guard and Protection Service[?] (SPP)
Romanian Intelligence Service[?] [SRI]
Russia
Federalnaya Sluzhba Bezopasnosti (FSB, successor ...