A method of operating a first base station in a mobile communications network, the mobile communications network comprising a mobile device, a second base station and a node that controls the first and second base stations, the mobile device having an active connection with the second base station, the mobile device not having an active connection with the first base station, the method comprising: receiving a data transmission (80; 102) sent from the mobile device to the second base station; attempting to decode the data transmission; receiving an indication of a scrambling code and/or an identifier used by the mobile device in transmitting data; and receiving information on the timing of data transmission by the mobile device, wherein the steps of receiving a data transmission and attempting to decode the data transmission comprises using the received indication of the scrambling code and/or the identifier and the received information on the timing of data transmission by the mobile device; and in the event that the data transmission is successfully decoded, transmitting the decoded data (88; 108) to the node or the second base station; wherein the step of transmitting comprises transmitting the decoded data to the node in the event that the data transmission is successfully decoded, and the method further comprises the step of: transmitting a signal to the second base station indicating the success or failure of the attempt to decode the data transmission, and transmitting a signal to the node indicating a decoding failure in the event that a data transmission is not successfully decoded after a predetermined number of retransmissions of the data transmission by the mobile device. receiving a data transmission (80; 102) sent from the mobile device to the second base station; attempting to decode the data transmission; receiving an indication of a scrambling code and/or an identifier used by the mobile device in transmitting data; and receiving information on the timing of data transmission by the mobile device, wherein the steps of receiving a data transmission and attempting to decode the data transmission comprises using the received indication of the scrambling code and/or the identifier and the received information on the timing of data transmission by the mobile device; and in the event that the data transmission is successfully decoded, transmitting the decoded data (88; 108) to the node or the second base station; wherein the step of transmitting comprises transmitting the decoded data to the node in the event that the data transmission is successfully decoded, and the method further comprises the step of: transmitting a signal to the second base station indicating the success or failure of the attempt to decode the data transmission, and transmitting a signal to the node indicating a decoding failure in the event that a data transmission is not successfully decoded after a predetermined number of retransmissions of the data transmission by the mobile device. transmitting a signal to the second base station indicating the success or failure of the attempt to decode the data transmission, and transmitting a signal to the node indicating a decoding failure in the event that a data transmission is not successfully decoded after a predetermined number of retransmissions of the data transmission by the mobile device.