V50 - had a lot of experience with Nigeria, have you? I have - I first lived out there in the mid 70s.
Let me tell you something you're obviously unaware of - a very large number of tickets on that route are sold for Naira, and CBN isn't exactly the world's fastest when it comes to expatriating funds. Also, the fare on the ticket is rarely the fare actually paid - especially by corporates.
LGW-LOS was BCal's most profitable route - unfortunately Sir Adam had to spend a great deal of his time down there negotiating the conversion of blocked monies into hard currency.
As a consultant, you should be well aware that hiccups in cashflow can be potentially disastrous when walking a line as fine as this one is.