The question has to be asked why BA continue to fly to Nigeria at all.
With the state of the airports & air-traffic control, the risks seem to be quite large.
Whilst visiting Lagos, I once spoke to the crew of a BA flight that said they wished they didn't have to keep coming here (if you're fortunate enough to arrive safely, you still have to contend with the bus-ride to the hotel!)
I would be interested to hear other crews thoughts on this.