Comment - White Riot in Rioja?

Spain’s premier wine region, Rioja, has been in heated debate over the addition of new white grape varieties to those allowed under the Rioja denomination. The introduction of several almost extinct local varieties has been widely accepted but, writes Chris Losh, the addition of the ubiquitous Chardonnay and Sauvignon Blanc to the region’s list of permitted white grapes has proved far more controversial.