A keyboard has a keypad layer of resiliently depressible keypads. The keyboard has a skin of dielectric material, covering a base of the keyboard. The skin contacts a capacitive touchscreen in use, and an actuating layer is on a face of the skin of dielectric material away from the base. The actuating layer comprises a plurality of conductive regions, one per keypad. A grounding layer is between the actuating layer and the keypad layer and spaced from the actuating layer during a rest state of the keyboard. Upon depression of a keypad, the keypad presses a region of the grounding layer under the keypad towards a region of the actuating layer such that the region of the actuating layer becomes grounded and causes a change in capacitance detectable by the capacitive touchscreen.