Highway Code vs Britain

Highway Code and Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
Highway Code	Yes	No	No	No
Britain	Yes	No	No	No

Highway Code (noun)	Britain (noun)
the code of rules governing the use of public roads	a monarchy in northwestern Europe occupying most of the British Isles; divided into England and Scotland and Wales and Northern Ireland; `Great Britain' is often used loosely to refer to the United Kingdom