The British constitution reference article from the English Wikipedia on 24-Apr-2004
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British constitution

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Constitution

The constitution of the United Kingdom is comprised of:

Together, these are the written and unwritten parts of the constitution.

The UK is said to have an unwritten constitution because there is no single constitutional document which defines the working of Britain's constitutional system, although many comentators prefer the term uncodified constitution, since much of the material is in fact in written form (see British constitutional law.)

Among the many key documents or conventions are:

Britain had a written constitution from 1653 to 1660.

In 2004, the Joint Committee of both the House of Commons and House of Lords, tasked with overseeing the drafting of the proposed Civil Contingencies Bill, published its first report, in which, amongst other things, it suggested ammending the bill's clauses that grant Cabinet Ministers the power "to disapply or modify any Act of Parliament" was overly wide, and that the bill should be modified to preclude changes to the following Acts, which, it suggested, formed "the fundamental parts of constitutional law" of the United Kingdom:

(names are shown as they appear in Hansard: [1])

… as well as the bill itself (presumably to be named the Civil Contingencies Act 2004). However, this amendment was defeated by the government.