A communications device for use in a mobile communications network, the mobile communications network comprising one or more other infrastructure equipment, the infrastructure equipment and other infrastructure equipment each providing wireless connectivity within at least one cell, wherein the communications device includes transmitter circuitry configured to transmit signals to the infrastructure equipment, receiver circuitry configured to receive signals from the infrastructure equipment, and controller circuitry configured to control the transmitter circuitry and the receiver circuitry. The controller circuitry controls the transmitter circuitry and the receiver circuitry to communicate wirelessly with at least a first of the infrastructure equipment including by the use of a radio bearer, to receive a reconfiguration message from the first infrastructure equipment to effect re-establishment of its radio link control protocol layer, and subsequently to re-establish its radio link control protocol layer in response to the reconfiguration message.