In Grenada, Jonathan Ray attempts to extend his life by eating plenty of dark chocolate.

I’m in the House of Chocolate mini museum in St. George’s, Grenada, and Kindra, my guide, is giving me a brief chocolate master class. Not only do I learn all about its production, I stuff my face with as much chocolate as I’ve ever eaten in one sitting and – best of all – discover that I’ve probably prolonged my life by several hours, if not days, by doing so, chocolate being about as good for you as anything can possibly be.