The most expensive bread was called 'marchet' and made of white wheat flour. Aristocratic households ate marchet, particularly during banquets. It was brewed without hops and was not particularly alcoholic.
People drank beer liberally.
Water, however, was considered unhealthy - and for good reason. Under Henry VII, French wines were imported in greater quantities - but only aristocrats drank them. The poor and wealthy alike lived off the land. England was self-sufficient, able to feed its population without resorting to imports. Most peasants had small bits of land, in villages and towns.