It’s been about five years since I was last in Zanzibar. I was part of the press gaggle accompanying the archbishops of the Anglican Communion on a day trip from the mainland to Christ Church Cathedral in Stone Town — the island’s principal town. Built over 125 years ago on the site of the old slave market (the altar was built atop the sight of the market’s whipping post) the picturesque coral stone cathedral is a monument to the British suppression of the slave trade. Zanzibar had been the entrepôt for slaves captured on the mainland before they were shipped north to the Arab world.