The MV Atlantic Hawk is loading with 57,000t of feed wheat at Frontier's Southampton Grain Terminal.
Jon Duffy, Frontier's trading director, said: "The loading of ships of this size is quite unusual, but this is the second one we have recently organised. In June we saw a Panamax leave for Vietnam, loaded with old crop wheat. This time it's a cargo of new harvest feed wheat destined for Thailand." Russia's ban on grain exports had created attractive opportunities for UK grain beyond traditional shipping destinations, he added.
The MV Atlantic Hawk is expected to take 10 days to load.