 The boiler pressure setting of rebalanced locomotives was reduced from .The lighter version of the rebalanced locomotives was reclassified to Class 14CB, with the "B" indicating branchline service.It is not clear which of these reboilering and rebalancing modifications were carried out first, one, the other, either one or together, but in whichever order, all twenty locomotives were eventually also reboilered with Watson Standard no.