B.O.A.C.'s order in 1957 was for 35 Standard VC 10s. This was related to its estimated future requirements for southern and eastern routes. In 1960 it exercised an option to order 10 Super VC l0s for its transatlantic routes. To improve operating flexibility, these orders were revised in 1961 to 12 Standard and 30 modified Super VC 10s.