Claim: Dartmouth House is located at 37 Charles Street (a street in the Mayfair district of the City of Westminster, London), and is used by more than 40,000 people every year.
Evidence: It is located at 37 Charles Street, southwest off Berkeley Square. Over 40,000 people use the building each year. Charles Street, is a street in the Mayfair district of the City of Westminster, London.