@Koritsi It was nearly 30 years ago. I don't really know what happened but I think it was a combination of British passports issued in Nigeria having a different font for some reason, the officer not knowing that there are black people in Britain(!), and me not giving a bribe.
My flight had had a stopover in Ivory Coast on the way there, which is why they deported there.
I spent another day locked up in Ivory Coast before everything was sorted out and I returned home. With a story to tell 😊