Nigeria Airways (and predecessor West African) had a longstanding arrangement with BOAC to operate lightly-rebadged leased aircraft, going back to the Stratocruiser, then Britannia, Comet 4, 707 and VC-10. They then bought one of the BOAC Standard VC-10s, but it crashed only 7 weeks after delivery, and they went back to leasing.
As this is a Comet thread, here's the joint BOAC/Nigerian timetable for 1962, an interesting time as it shows all of Britannia, Comet and 707 leased to Nigerian (flight prefix WT) on London to Lagos
http://www.timetableimages.com/ttima...62/ba62-41.jpg