The duo headed to Alsace and Burgundy for a lesson on barrel making, and ‘terroir’ - a catch-all way of describing the many factors that can influence the quality of a vineyard. Oz then took a sceptical James to meet one of Burgundy’s most celebrated winemakers, Thierry Beaumont, to sample Burgundies from Thierry’s three separate terroirs.

• James May
• Oz Clarke