A disc brake comprising: a caliper having a housing defining a cavity; an actuation mechanism located at least partially within the cavity of the caliper housing; a cover plate that closes a mouth of the cavity, the mouth being adjacent a rotor of the disc brake in use, and the cover plate being releasably mounted to an outboard facing surface of the housing by at least one fastening member that is insertable in a generally inboard direction and removable in a generally outboard direction; and a brake carrier to transmit a braking induced torque load from the inboard brake pad to a vehicle axle or the like, wherein the actuation mechanism comprises a spreader plate for transferring force from a piston of the actuation mechanism to an inboard brake pad of the brake, the spreader plate being arranged intermediate the cover plate and the rotor in use, wherein the spreader plate comprises at least one bore or recess dimensioned and aligned so as to allow a tool to access the at least one fastening member to fit or remove the cover plate, wherein the spreader plate and piston are integrally and monolithically formed from the same piece of material, wherein the cover plate comprises an opening, through which the piston extends, and wherein the spreader plate engages the carrier, such that the spreader plate is guided by the carrier when the disc brake is actuated. a caliper having a housing defining a cavity; an actuation mechanism located at least partially within the cavity of the caliper housing; a cover plate that closes a mouth of the cavity, the mouth being adjacent a rotor of the disc brake in use, and the cover plate being releasably mounted to an outboard facing surface of the housing by at least one fastening member that is insertable in a generally inboard direction and removable in a generally outboard direction; and a brake carrier to transmit a braking induced torque load from the inboard brake pad to a vehicle axle or the like, wherein the actuation mechanism comprises a spreader plate for transferring force from a piston of the actuation mechanism to an inboard brake pad of the brake, the spreader plate being arranged intermediate the cover plate and the rotor in use, wherein the spreader plate comprises at least one bore or recess dimensioned and aligned so as to allow a tool to access the at least one fastening member to fit or remove the cover plate, wherein the spreader plate and piston are integrally and monolithically formed from the same piece of material, wherein the cover plate comprises an opening, through which the piston extends, and wherein the spreader plate engages the carrier, such that the spreader plate is guided by the carrier when the disc brake is actuated. wherein the actuation mechanism comprises a spreader plate for transferring force from a piston of the actuation mechanism to an inboard brake pad of the brake, the spreader plate being arranged intermediate the cover plate and the rotor in use, wherein the spreader plate comprises at least one bore or recess dimensioned and aligned so as to allow a tool to access the at least one fastening member to fit or remove the cover plate, wherein the spreader plate and piston are integrally and monolithically formed from the same piece of material, wherein the cover plate comprises an opening, through which the piston extends, and wherein the spreader plate engages the carrier, such that the spreader plate is guided by the carrier when the disc brake is actuated.