The UK and Bangladesh have fundamentally different constitutional frameworks:
| Aspect | United Kingdom | Bangladesh |
|---|---|---|
| Form | Unwritten (statutes, conventions, common law) | Written (1972, amended) |
| Head of State | Monarch (King Charles III), hereditary, ceremonial | President (elected by Parliament, 5-year term) |
| Legislature | Parliament (Commons elected, Lords appointed) | Jatiya Sangsad (unicameral, elected) |
| Executive | Prime Minister (PM) leads Cabinet | Prime Minister (PM) leads Cabinet; President appoints PM |
| Judiciary | Common law; Supreme Court (UK) | Mixed common law & Islamic law; Supreme Court |
| Sovereignty | Parliamentary sovereignty | Constitutional supremacy (judicial review) |
The UK's constitution evolved organically; Bangladesh's was drafted post-independence (1971).