The mist lifts from the mountains of Kenya's fabled Rift Valley, better known for its flamingoes and zebras than its wine, as women weave in and out with baskets of grapes on their heads. It is grape picking time at Kenya's only commercial vineyard. Dressed in cowboy boots and jeans with three days' stubble and greying hair, manager James Farquharson supervises the harvest and pretty much all else going on at the vineyard.