A method performed by a terminal device for communicating with a network infrastructure equipment in a wireless telecommunications system using radio resources comprising a narrowband carrier supported within a wider system frequency bandwidth of the wireless telecommunications system, wherein the wider system frequency bandwidth is divided into predefined groups of physical resource blocks and wherein the method comprises establishing initial frequencies for the radio resources comprising the narrowband carrier; receiving configuration signalling from the network infrastructure equipment providing an indication of a frequency shift to apply to the initial frequencies for the radio resources comprising the narrowband carrier; establishing shifted frequencies for the radio resources comprising the narrowband carrier by applying the indicated frequency shift to the initial frequencies; and communicating with the network infrastructure equipment using the radio resources for the narrowband carrier with the shifted frequencies; wherein the narrowband carrier is one of a plurality of narrowband carriers supported within the wider system frequency bandwidth of the wireless telecommunications system, and wherein the configuration signalling received from the network infrastructure equipment provides an indication of a frequency shift for each of the narrowband carriers; and wherein the frequency shift for a first group of the narrowband carriers and the frequency shift for a second group of the narrowband carriers have different magnitudes, and / or the frequency shift for a first group of the narrowband carriers and the frequency shift for a second group of the narrowband carriers are in different directions; and wherein the frequency shift is such that boundaries of the narrowband carriers align with boundaries between the predefined groups of physical resource blocks. establishing initial frequencies for the radio resources comprising the narrowband carrier; receiving configuration signalling from the network infrastructure equipment providing an indication of a frequency shift to apply to the initial frequencies for the radio resources comprising the narrowband carrier; establishing shifted frequencies for the radio resources comprising the narrowband carrier by applying the indicated frequency shift to the initial frequencies; and communicating with the network infrastructure equipment using the radio resources for the narrowband carrier with the shifted frequencies; wherein the narrowband carrier is one of a plurality of narrowband carriers supported within the wider system frequency bandwidth of the wireless telecommunications system, and wherein the configuration signalling received from the network infrastructure equipment provides an indication of a frequency shift for each of the narrowband carriers; and wherein the frequency shift for a first group of the narrowband carriers and the frequency shift for a second group of the narrowband carriers have different magnitudes, and / or the frequency shift for a first group of the narrowband carriers and the frequency shift for a second group of the narrowband carriers are in different directions; and wherein the frequency shift is such that boundaries of the narrowband carriers align with boundaries between the predefined groups of physical resource blocks.