Measures for the communication of data with respect to at least two different user devices in a data communications network. Establishing a communications session for the communication of data to and/or from the at least two different user devices, receiving, on the basis of user input at one of the at least two different user devices, an identifier identifying one or more downloadable resources, generating a transmissible identifier based at least in part on the received identifier, the transmissible identifier being operable to initiate the download of the one or more downloadable resources using the transmissible identifier, and to associate a predetermined identity with the download, and enabling the download of the one or more downloadable resources to another of the at least two different user devices using the transmissible identifier.