A drayman was historically the driver of a dray, a low, flat-bed wagon without sides, pulled generally by horses or mules that were used to transport all kinds of goods.
A drayage company and draymen provide carriage from or to a port or railway ramp.
The contents are either cross docked for outbound long haul carriage or the container is drayed to the receiver who unloads it.
Some breweries still maintain teams of horses and a dray, but these are used only for special occasions such as festivals or opening new premises.
There are some breweries still delivering daily/weekly using horses, Hook Norton in Oxfordshire and Sam Smiths in Tadcaster being two of them.