In addition to the railway transport, three tugs, named Hilgay, Littleport and Wissington, were used to transport goods from the factory to King's Lynn and coal from King's Lynn to the factory in a fleet of 24 steel barges. The Ministry of Agriculture deemed that the factory was of strategic importance during World War II, and took responsibility for it from March 1941. They drafted in Italian prisoners of war to refurbish the railway, and to construct the first roads to the factory.
In addition to using railway transport, three tugs named Hilgay, Littleport, and Wissington were employed to move goods from the factory to King's Lynn and coal from King's Lynn to the factory. A fleet of 24 steel barges was part of a total of 27 vessels. The Ministry of Agriculture deemed the factory strategically important during World War II and assumed responsibility for it in March 1941. They recruited Italian prisoners of war to refurbish the railway and construct initial roads leading to the factory.