A method of transmitting data in a mobile communications network (100, 300), 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, wherein the first time period is a time period at the beginning of a transmission frame for transmitting the first data; identifying second data to be transmitted to a second mobile unit in the second time period; and upon identification of the second data: selecting a set of re-allocated resources from the first allocated resources; transmitting, in the set of re-allocated resources, second control information and the second data, the second control information notifying the second mobile unit of an allocation of resources for the transmission of the second data the second data being transmitted in a selected time period within the second time period; transmitting third control information, the third control information notifying the first mobile unit of the use of the set of re-allocated resources originally allocated for the transmission of the first data for transmissions other than of the first data, wherein the third control information is transmitted in a time period after the second time period and at the end of a transmission frame for transmitting the first data. 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, wherein the first time period is a time period at the beginning of a transmission frame for transmitting the first data; identifying second data to be transmitted to a second mobile unit in the second time period; and upon identification of the second data: selecting a set of re-allocated resources from the first allocated resources; transmitting, in the set of re-allocated resources, second control information and the second data, the second control information notifying the second mobile unit of an allocation of resources for the transmission of the second data the second data being transmitted in a selected time period within the second time period; transmitting third control information, the third control information notifying the first mobile unit of the use of the set of re-allocated resources originally allocated for the transmission of the first data for transmissions other than of the first data, wherein the third control information is transmitted in a time period after the second time period and at the end of a transmission frame for transmitting the first data. selecting a set of re-allocated resources from the first allocated resources; transmitting, in the set of re-allocated resources, second control information and the second data, the second control information notifying the second mobile unit of an allocation of resources for the transmission of the second data the second data being transmitted in a selected time period within the second time period; transmitting third control information, the third control information notifying the first mobile unit of the use of the set of re-allocated resources originally allocated for the transmission of the first data for transmissions other than of the first data, wherein the third control information is transmitted in a time period after the second time period and at the end of a transmission frame for transmitting the first data.