A leaf spring suspension system for supporting a vehicle chassis (104) relative to a vehicle axle (105), the suspension system being arranged to be connected between first and second spaced connection locations of said vehicle chassis. The suspension system comprises a first elongate leaf member (10) arranged to be pivotably connected at a first end (14) thereof to the first connection location, and a second leaf member (12) pivotably connected at a second end (16) of said first member (10). A link member (108) is connected between the second leaf member (12) and the second connection location of said chassis, wherein the link member (108) is pivotably connected to the second leaf member at a first end thereof and is connected to the chassis at a second end thereof such that the angular orientation of the link member relative to the chassis can be altered in order to accommodate raising or lowering of the chassis relative to the vehicle axle.