radio theatre vs British spelling

radio theatre and British spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
radio theatre	Yes	No	No	No
British spelling	Yes	No	No	No

radio theatre (noun)	British spelling (noun)
a dramatized, purely acoustic performance, broadcast on radio or published on audio media, such as tape or CD.	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')