A mobile telecommunications network includes a core network and a radio access network. The radio access network has a network node that wirelessly communicates with a mobile terminal registered with the radio access network. The radio access network includes a controller that controls the use of network resources by the mobile terminal and processes control plane signaling. The controller includes an applicator that receives policy information and/or routing information from the core network and provides instructions to the network node to act in accordance with the received information. The network node includes an enforcer that enforces the instructions received from the controller so as to control whether the terminal uplink user plane traffic and control plane signalling messages are passed to the core network, routed to the controller, or duplicated and provided to both the core network and the controller.