Vehicle disc brakes

In or for a vehicle disc brake assembly comprising a support structure defining a cylinder body, a brake actuating piston housed within said cylinder body, a brake pad assembly movably mounted on said body for movement along the axis of said piston under thrusts applied to said pad assembly by said piston in the course of braking application, and a pad assembly retainer plate positioned between said piston and said pad assembly, said plate including a pad assembly engaging portion detachably engageable with said pad assembly in a manner preventing relative radial movement between said plate and said pad assembly with respect to said support structure, said plate also including a piston engaging portion detachably engageable with said piston to prevent undesired movement of said pad assembly and retaining plate relative to said support structure in a direction radially outward of said structure, said piston engaging portion including a part projecting outwardly beyond the piston for resiliently displacing said piston engaging portion to release it from engagement with said piston, thereby to free the plate and pad assembly for removal together from said support structure.