Nairobi, Tuesday 7am. Darkness lifts as we progress slowly through passport control and baggage reclaim, then out into the melee of taxis, buses and safari jeeps clamouring for passengers or waiting for someone to spot their name on a board and head out under the big morning sky. The expressway from airport to city is a racetrack of vehicles constantly changing lanes and squeezing through gaps which are barely there. Alongside and parallel, huge numbers of people make their way on foot to their workplace, giving the industrial quarter the look of an African Lowry painting, stick figures jostling through crowds in every direction. We are met at our one-nighter…