A method of operation of a control node (400, 700, 1000) in a mobile communications network, the method comprising: receiving a request for authorization from a user equipment (500, 800, 1100); determining whether the request for authorization includes evidence that the user equipment is authorized by a trusted traffic authority; and processing the request for authorization only if the request for authorization includes evidence that the user equipment is authorized by the trusted traffic authority. Methods for the user equipment and a trusted authority device, as well as corresponding devices, computer programs and computer program products are also disclosed.