Passage: Though the UK parliament remains the sovereign parliament, Scotland has a parliament and Wales and Northern Ireland have assemblies. De jure, each could have its powers broadened, narrowed or changed by an Act of the UK Parliament. The UK is a unitary state with a devolved system of government. This contrasts with a federal system, in which sub-parliaments or state parliaments and assemblies have a clearly defined constitutional right to exist and a right to exercise certain constitutionally guaranteed and defined functions and cannot be unilaterally abolished by Acts of the central parliament.

Question: What type of system of government does the UK have?
devolved