Which of the following is a key feature of the UK constitution?

The UK constitution is characterized by its uncodified and flexible nature, making option B the correct choice. Unlike many other countries that have a single, written constitution, the UK’s constitution comprises various sources, including statutes, common law, conventions, and international treaties. This means that it does not exist as one singular written document but as a collection of legal principles and practices that develop over time.

The flexibility of the UK constitution allows it to adapt more easily to changing political and social circumstances. For example, statutes can be passed or repealed by a simple majority in Parliament, and conventions can evolve without formal procedures. This adaptability is fundamental to the UK's parliamentary democracy, enabling the system to respond to new challenges without the need for a rigid amendment process.

In contrast, a rigid and codified constitution implies a strict framework that requires specific procedures for amendments, which does not apply to the UK context. The assertion that the UK constitution is based solely on written law is inaccurate; much of it is derived from unwritten sources. Lastly, while some constitutions require a referendum for amendments, the UK does not have this requirement for most constitutional changes, further supporting the notion of its flexibility.