London is not a global city.
Global city . The use of `` global city '' , as opposed to `` megacity '' , was popularized by sociologist Saskia Sassen in her 1991 work , The Global City : New York , London , Tokyo ; although the term `` world city '' , which refers to cities involved with large amounts of global business , dates to at least the May 1886 description of Liverpool , by The Illustrated London News . London . London is a leading global city in the arts , commerce , education , entertainment , fashion , finance , healthcare , media , professional services , research and development , tourism , and transportation .