A method and a mobile services switching centre of providing differentiated services in a communications network. The method comprises receiving in a mobile services switching centre an indication message from a first radio access network, said message indicating a radio access network type to which a called communication apparatus of a terminating communication session is connected, in response to the indication message: accessing differentiated service information associated with the radio access network type of the terminating communication session, and sending the differentiated service information to be applied for service differentiation by a second access network of calling communication apparatus.