A mobile communications terminal for communicating data to/from one or more base stations of a mobile communications network, the one or more base stations being arranged to provide a radio interface to communicate with mobile communications terminals. The mobile communications terminal being arranged to communicate with the one or more base stations via the radio interface, the communicating including using an uplink random access channel of the radio interface to transmit random access messages to the one or more base stations and communicating user data via the uplink random access channel by transmitting one or more of the random access messages at a selected timing within the uplink random access channel, the timing being selected by the first mobile communications terminal to represent at least part of the user data.