city centre vs British spelling

city centre and British spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
city centre	Yes	No	No	No
British spelling	Yes	No	No	No

city centre (noun)	British spelling (noun)
the central part of a city	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')