For the U.S. National Vegetation Classification, see U.S. National Vegetation Classification.The British National Vegetation Classification or NVC is a system of classifying natural habitat types in Great Britain according to the vegetation they contain. A large scientific meeting of ecologists, botanists, and other related professionals in the United Kingdom resulted in the publication of a compendium of five books (British Plant Communities ;ISBN 0-521-79716-0), edited by John S.