“Ha-lleluuuu-jah,” booms the distinctive voice of Pastor Enoch Adeboye, also known as the general overseer.

The sound comes out through thousands of loudspeakers planted in every corner of Redemption Camp. Market shoppers pause their haggling, and worshippers – some of whom have been sleeping on mats in this giant auditorium for days – stop brushing their teeth to join in the reply.

Hallelujah is the theme for this year’s Holy Ghost convention at one of Nigeria’s biggest megachurches, and all week the word echoes among the millions of people attending.

As evening falls on Friday, Adeboye, a church celebrity, is soon to take the stage at his vast new auditorium to give the convention’s last, three-hour sermon. Helicopters land next to the 3 sq km edifice, delivering Nigeria’s rich and powerful to what promises to be the night of the year.

Thousands of worshippers surge up the hill towards the gleaming warehouse. Shiny SUVs, shabby Toyota Corollas and packed yellow buses choke the expressway all the way from Lagos, 30 miles away.

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