What are the criticisms/weaknesses of the UK constitution?

The UK constitution has been subject to criticism because it is an uncodified (unwritten) document. The four main criticisms are a follows:1 - Uncertainty. Due to the 'unwritten' nature of the constitution, there is often confusion surrounding constitutional rules. This occurs because the rules are not fixed, and so are difficult to decipher.Example: The convention of individual ministerial responsibility is unclear, particularly about whether 'responsibility' means resignation.2 - Elective Dictatorship. In theory, the UK constitution allows for elective dictatorship (a term first put forward by Lord Hailsham). By concentrating power in the hands of the executive, it means the government of the day has a 'dictatorship' to reshape the constitution itself, at least until the next election.3 - Centralisation. This occurs due to weak and ineffective checks and balances. Limited government power due to internal links between government bodies is a key element of a liberal democracy, however the UK system sees more concentration of power, rather than the desired fragmentation.Example: In the early years of his term in power, Blair's landslide majority meant he was able to introduce a number of policies without worrying about being defeated, due to his control of the Commons.4 - Weak Protection of Rights. Civil liberties and freedoms have weak protections - this happens because individual rights are not written down, and so do not have any legal backing.Example: Human Rights Act (1998) has defined rights more clearly, but it is nowhere near as effective as a written, legal document such as a bill of rights.