Some scholars believe that constitutional norms do not exist unless they are in some way enshrined in a written document (e.g., Rubenfeld 1998). But most accept that constitutions (or elements of them) can be unwritten, and cite, as an obvious example of this possibility, the constitution of the United Kingdom. One must be careful here, however. Though the UK has nothing resembling the American Constitution and its Bill of Rights, it nevertheless contains a number of written instruments which ha