BR introduced a revised design of Presflo for ICI Salt. These had a pair of silos, instead of just one, and could be distinguished by duplication of the discharge pipes and valves, and a different bottom to the hopper. One batch of twenty were built within lot 3029 (a batch of 100 wagons). No separate diagram was issued and at some time during the 1960s they transferred to other traffic - as recorded here for Delafilla and Slate powder. The ICI blue livery remained but faded with time.