I can think of some events that might have engendered suich thoughts by more than Oni (not suggesting at all that is what is behind the latest news).
The end of the Raj was overdue.
If the "colonial adminsistration" from the UK had been more ameniable to promoting Nigerians rather than bringing a constant stream of fair haired Son's into the operation, perhaps it would have turned out better than it has.
For such a lengthy business presence in the country there sure has not been the amount of capital investment for infrastructure and facilities one might have seen if Bristow had intended to be a real player in the long term.