A mobile communications network for communicating data to/from mobile communications devices, including a core network part including plural infrastructure equipment, and a radio network part including plural base stations communicating data to/from the mobile communications devices. The mobile communications device communicates an indication of a relative type of data packets for communication via a communications bearer for supporting a communications session of the mobile communications device, the indication used to configure the communications bearer, and provides the communications bearer from the mobile communications device to one or more of the infrastructure equipment via the base stations in accordance with the indication and to control the communication of the data packets via the communications bearer in accordance with the indication communicated via the communications bearer, to control the communication of the data packets from the communications bearer differently to data packets communicated via other communications bearer having a higher priority.