A method of operating a communications device to transmit data to a wireless communications network, the method comprising processing first uplink data and second uplink data for transmission on grant free resources of a physical uplink shared channel of a wireless access interface provided by the wireless communications network to form one or more transport blocks of the first uplink data and one or more transport blocks of the second uplink data for transmission, the grant free resources providing communications resources in each of a plurality of time divided units of the wireless access interface for transmitting the first uplink data and the second uplink data, selecting a first of a plurality of configurations (620, 622) for transmitting the first uplink data in the grant free resources, selecting a second of the plurality of configurations (620, 622) for transmitting the second uplink data in the grant free resources, processing the first uplink data for transmission on the grant free resources according to the selected first configuration, processing the second uplink data for transmission on the grant free resources according to the selected second configuration, transmitting the first uplink data in the grant free resources according to the selected first configuration, determining that the second uplink data has a relative priority of transmission higher than the first uplink data, scheduling the transmission of the second uplink data according to the selected second configuration in preference to the transmission of the first uplink data in accordance with the relative priority between the first uplink data and the second uplink data, and transmitting the second uplink data in the grant free resources according to the selected second configuration, wherein the first configuration includes a transmission period for transmitting the one or more transport blocks of the first uplink data in the grant free resources, and a temporal starting position of the transmission period of the first uplink data in one of the time divided units of the wireless access interface for transmitting the first uplink data in the grant free resources, and the second configuration includes a transmission period for transmitting the one or more transport blocks of the second uplink data in the grant free resources, and a temporal starting position of the transmission period of the second uplink data in one of the time divided units of the wireless access interface for transmitting the second uplink data in the grant free resources, the temporal starting position and the transmission period being different for the first configuration and the second configuration. processing first uplink data and second uplink data for transmission on grant free resources of a physical uplink shared channel of a wireless access interface provided by the wireless communications network to form one or more transport blocks of the first uplink data and one or more transport blocks of the second uplink data for transmission, the grant free resources providing communications resources in each of a plurality of time divided units of the wireless access interface for transmitting the first uplink data and the second uplink data, selecting a first of a plurality of configurations (620, 622) for transmitting the first uplink data in the grant free resources, selecting a second of the plurality of configurations (620, 622) for transmitting the second uplink data in the grant free resources, processing the first uplink data for transmission on the grant free resources according to the selected first configuration, processing the second uplink data for transmission on the grant free resources according to the selected second configuration, transmitting the first uplink data in the grant free resources according to the selected first configuration, determining that the second uplink data has a relative priority of transmission higher than the first uplink data, scheduling the transmission of the second uplink data according to the selected second configuration in preference to the transmission of the first uplink data in accordance with the relative priority between the first uplink data and the second uplink data, and transmitting the second uplink data in the grant free resources according to the selected second configuration, wherein the first configuration includes a transmission period for transmitting the one or more transport blocks of the first uplink data in the grant free resources, and a temporal starting position of the transmission period of the first uplink data in one of the time divided units of the wireless access interface for transmitting the first uplink data in the grant free resources, and the second configuration includes a transmission period for transmitting the one or more transport blocks of the second uplink data in the grant free resources, and a temporal starting position of the transmission period of the second uplink data in one of the time divided units of the wireless access interface for transmitting the second uplink data in the grant free resources, the temporal starting position and the transmission period being different for the first configuration and the second configuration.