BA CityFlyer is a wholly owned subsidiary airline of British Airways with its head office in Didsbury, Manchester, England. It operates a network of domestic and European services from its main base at London City Airport. All services operate with BA's full colours, titles, and flight numbers.BA Cityflyer Limited holds a United Kingdom Civil Aviation Authority Type A Operating Licence, it is permitted to carry passengers, cargo and mail on aircraft with 20 or more seats.