A vehicle suspension system comprising: at least one suspension bellows , a source of pressurised fluid , a supply line which extends between the suspension bellows and the source of pressurised fluid via a raise/lower valve , and a manually operable operating member which is movable between a raise position, a lower position and a drive position, the operating member being connected to the raise/lower valve which is configured such that when the operating member is moved to the raise position, the raise/lower valve moves to a raise position in which the suspension bellows are directly connected to the source of pressurised fluid , when the operating member is moved to the lower position, the raise/lower valve moves to a lower position in which suspension bellows are vented to a low pressure region, and when the operating member is moved to the drive position, the raise/lower valve moves to a drive position in which the suspension bellows are connected to the or a further source of pressurised fluid via an electrically operated suspension valve assembly , wherein the raise/lower valve is further provided with a fluid pressure operated actuator which moves the raise/lower valve to the drive position when pressurised fluid is supplied to the actuator , and a pilot pressure line by means of which pressurised fluid is supplied to the actuator and characterised in that the pilot pressure line is connected to a pilot line source of pressurised fluid, which is one of the source of pressurised fluid or the further source of pressurised fluid or a further alternative source of pressurised fluid, via the suspension valve assembly , the suspension valve assembly being operable to control flow of fluid from the pilot line source of pressurised fluid into the pilot pressure line . at least one suspension bellows , a source of pressurised fluid , a supply line which extends between the suspension bellows and the source of pressurised fluid via a raise/lower valve , and a manually operable operating member which is movable between a raise position, a lower position and a drive position, the operating member being connected to the raise/lower valve which is configured such that when the operating member is moved to the raise position, the raise/lower valve moves to a raise position in which the suspension bellows are directly connected to the source of pressurised fluid , when the operating member is moved to the lower position, the raise/lower valve moves to a lower position in which suspension bellows are vented to a low pressure region, and when the operating member is moved to the drive position, the raise/lower valve moves to a drive position in which the suspension bellows are connected to the or a further source of pressurised fluid via an electrically operated suspension valve assembly , wherein the raise/lower valve is further provided with a fluid pressure operated actuator which moves the raise/lower valve to the drive position when pressurised fluid is supplied to the actuator , and a pilot pressure line by means of which pressurised fluid is supplied to the actuator and characterised in that the pilot pressure line is connected to a pilot line source of pressurised fluid, which is one of the source of pressurised fluid or the further source of pressurised fluid or a further alternative source of pressurised fluid, via the suspension valve assembly , the suspension valve assembly being operable to control flow of fluid from the pilot line source of pressurised fluid into the pilot pressure line . <EOS>