Bollinger’s signature is a dry, rich, biscuity style, a mature and complex full flavoured Champagne that has long been popular with the UK market. Much of the flavour can be attributed to fermentation of the wine in oak barrels which is not common practice in the Champagne region. Bollinger is also unique among Champagne houses in that the reserve wines are all bottled in magnum and with natural cork, a huge, labour-intensive effort.