Tourists out for a gentle stroll today in Hyde Park had their peace shattered by African drumming, cars pipping and a wild man dressed as a Victorian explorer interviewing people dressed in all sorts of outfits. This was no anti-Mugabe rally, or some world music festival, rather the launch of the Africa Rally, the latest madcap crap car drive organised by the Adventurists, the Bristol-based people who aim to make the world a little......