Production assistant Yvonne Bryan holds dry Manuka in a laboratory at the Tregothnan Estate near Truro in Cornwall, January 14, 2013. Tregothnan is bucking an historic trend by growing tea in England and exporting almost half of it abroad, including to tea-growing nations like China and India. Owned by a descendant of 19th century British Prime Minister Charles Grey, after whom the Earl Grey tea blend was named, the Tregothnan estate has been selling tea since 2005 and currently produces around 10 tonnes a year of tea and infusions. REUTERS/Stefan Wermuth (BRITAIN - Tags: SOCIETY ENVIRONMENT BUSINESS)