Examples of the disclosure relate to apparatus, methods and computer programs for transmitting data. In examples of the disclosure a User Equipment (UE) can receive a configuration for releasing demodulation reference signal (DMRS) resources for uplink transmission. The releasing of the DMRS resources is contingent upon a resource allocation for the uplink transmission satisfying one or more criteria. The UE can also receive a resource allocation for the uplink transmission. If the resource allocation satisfies the one or more criteria the UE can release at least some of the DMRS resources. The UE can then use at least some of the released DMRS resources as a data resource within the resource allocation and transmit data using at least some of the released DMRS resources.