En primeur is the futures market of the wine world. Historically the British have been the most consistent clients in this market because as a wine drinker you can assure your allocation of sought after wines and ensure that they only travel from the producer to your storage site, after which only you disturb them. Buying en primeur also enables you to specify your preferred bottle sizes. Conversely, if you wish to buy or sell on the secondary market then if they have been stored under bond, wines bought en primeur have the best provenance.
