The UK has a constitution, it's just not written in a single place.
Many (most?) western societies have a similar concept for civil and criminal law with common law jurisdictions, where precedent is used rather than an explicit, exhaustive legal code. Effectively, the UK's constitution is to written constitutions as common law is to civil law.
Many (most?) western societies have a similar concept for civil and criminal law with common law jurisdictions, where precedent is used rather than an explicit, exhaustive legal code. Effectively, the UK's constitution is to written constitutions as common law is to civil law.