1. An information interface system, comprising: speech recognition means arranged to listen to voice signals carried on a communications channel between a user and another person, and to recognise at least one or more predefined keywords or phrases contained within the voice signals; keyword processing means arranged to relate any recognised keywords or phrases to items of information stored in an information database so as to identify relevant items of information thereto; information display means arranged to display any items of information and/or links thereto identified by the keyword processing means to the user; and speech recognition control means arranged to activate or deactivate the speech recognition means in response to one or more predetermined criteria.