R & R (Rights and Responsibilities) - Does Australia need a Bill of Rights?

In her address today, Jennie Dyster, our Lay Leader confesses to a degree of duplicity in its title - "R and R" - not "Rest and Recreation" but "Rights and Responsibilities".
Today Jennie focuses on Human Rights in Australia and considers whether Australians need a Bill of Rights. Or does the English Common Law system we've inherited - the law made by our Judges and Australian parliaments provide sufficient protection against violations of our Human Rights?