Jeffrey ran the annual evening wine school for the International Wine and Food Society. He continues to lecture and adjudicate the WSET (Wine and Spirit Education Trust) examinations. The subjects include wine appreciation, wine tasting, matching food and wine and in-depth lectures on the wine growing regions of the world. These tailor-made lectures can be adapted to suit the general public, or the food and beverage staff at hotels and restaurants, which include full product training and service. Jeffrey has written and contributed to seven books and many articles on food, wine and travel and has been featured on BBC radio and other television and radio programmes in other countries. Jeffrey has been an advisor to the Indage Group, Bombay in the development of their wines since the first vintage in 1985. In 2000 he formed a joint venture company called 'Chateau Indage Vintners Ltd' to distribute wines from around the world to all the major hotel and restaurant groups. He continually visits India to conduct tailor made product and staff training programs.