What is the difference between a codified constitution and an uncodified constitution?

A codified constitution is a constitution which is located in a single document or a collection of documents. It operates to clearly state the structure/shape of the government, the manner upon which laws are made and passed, the separation of powers of the judiciary, legislature and the executive, the relationship between the individual and the state and the rights of the individual as a citizen of the state. Codified constitutional law has a 'higher legal status' than normal statutory Law as it is usually entrenched by special procedures which requires supermajorities in the legislature to change/amend the law. A great example of an operative codified constitution is that of the United States of America, which entered into legal force on March 4th, 1789.
In contrast an uncodified constitution, such as the British Constitution, is not located in a singe document or collection of documents. Instead, it is drawn from different sources, such as statutory Law, EU Law, Common Law, Constitutional conventions and authoritative texts. Furthermore, there is not a strict separation of powers in the UK constitution as the legislature and executive are 'fused', there is no 'higher status Law' as statutory Law has the highest domestic legal status and there is arguably no proper protection for constitutional Law, but this is rebuttable nowadays. However in similarity, both types of constitution operate to lay the foundations and principles of how the state is governed, and there are multiple similarities between the two types of constitution, such as the creation of a recognised document of human rights in the Human Rights Act (1998), a separate and independent judiciary created by the Constitutional Reform Act (2005) and the establishment of a routine way in which Laws are made and passed.
codified means written clearly in a document or collection of documentsuncodified means that the constitution is not written clearly in a document or collection of documents