A mobile communications network for use in a mobile communications system for communicating data to/from mobile communications terminals, the mobile communications network including one or more base stations arranged to provide a radio interface to communicate with mobile communications terminals, wherein a mobile communication terminal is arranged to use an uplink random access channel of the radio interface to transmit random access messages to the network apparatus;
- and the mobile communications network is arranged, upon reception of a random access message, to detect whether user data is communicated via the random access message, the user data being at least partially represented by a selected timing for transmitting the random access message.