A steering column assembly having a shroud comprises a first member 1 having an end portion which is received within a second member 2 having at least one slit through its wall extending partially along its length, a guide bush 20 located between the first member and the second member and fixed relative to one of the members and providing a surface over which the other member can slide to alter the overall length of the shroud and a clamp mechanism 7 which squeezes the second member 2 onto the guide bush 20 which is in turn squeezed onto the first member 1. The cross section of the guide bush 20 varies along its length to vary the resistance it provides to crushing by the action of the clamp mechanism when the shroud is at its greatest length and the resistance it provides when the shroud is clamped at its shortest length.
