An increase in traffic numbers saw the flight being operated twice weekly from January 1935, and it was at this time that the airline completed negotiations with the Air Ministry for the creation of a route from Khartoum in Anglo-Egyptian Sudan to Nigeria.
Imperial Airways required an airline to operate between Kano and the Elder Dempster Lines docks at Takoradi in the Gold Coast.
[2] On 13 October 1937 flights on the route from Lagos-Accra were commenced utilising a de Havilland Express from Imperial Airways.
[1][3] It was reported that traffic on the route was held back by health issues, but Imperial Airways overcame these concerns by installing an apparatus capable of killing mosquitoes in the aircraft.
[4] A weekly service in conjunction with Imperial from Freetown to Bathurst was commenced on 25 June 1938 with Short Scion Senior, and was operated via Conakry, Bolama and Bissau.