A method of transmitting data in a mobile communications network, the method comprising transmitting first data to a first mobile unit wherein transmitting the first data comprises transmitting first control information in a first time period, the first control information identifying first allocated resources for transmitting the first data in a subsequent second time period. The method further comprises identifying second data to be transmitted to a second mobile unit in the second time period and, upon identification of the second data: transmitting the second data in second resources, wherein the second resources comprises a set of re-allocated resources selected from the first allocated resources, the second data being transmitted in a selected time period within the second time period; and transmitting second control information, the second control information notifying the first mobile unit of the transmission of data other than the first data in the set of re-allocated resources originally allocated for the transmission of the first data.