A mobile communications system transmitting data to and/or receiving data from communications devices includes one or more base stations, each including a transmitter and a receiver configured to provide a wireless access interface for communicating data to/from the communications devices. The wireless access interface provides plural communications resource elements across a first frequency range and within a second frequency range within and smaller than the first frequency range. The wireless access interface includes plural time divided sub-frames, at least one of the sub-frames including a first wideband control channel in a part of each sub-frame for communicating first signalling information to one or more of the communications devices, and a second narrow band control channel in a second part of each sub-frame. The base stations are configured to transmit a sleep indication signal to one or more of the communication devices, to realize a power saving.