An electrically controlled braking system, in which the operation of the brake actuation is split into three bands depending upon the brake demand level, such that at low demand in a first band the braking pressures are set to generate equal wear at the vehicle axles, and at higher demands in a third band braking pressures are set to apportion braking between axles dependent upon the axle loads being carried, while in a second band, located intermediate the first and second bands, the braking is gradually changed from being equal to being fully apportioned, the extent of this change-over depending upon the actual level of demand within this second band.