A mobile communications system includes a wireless access interface communicating data to/from mobile communications devices, the wireless access interface provided on a downlink first carrier, the first carrier providing 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 each including the plural communications resource elements of the first and second frequency ranges, each sub-frame including a first wideband control channel in a part having a bandwidth corresponding substantially to the first frequency range, and a second narrow band control channel in a second part. The second narrow band control channel can communicate control information to first and second mobile communications devices and forms part of plural communications resource elements of the second frequency range, to make more use of the communications resources available to the communications system.