dead centre vs British spelling

dead centre and British spelling both are nouns.

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

dead centre (noun)	British spelling (noun)
the position of a crank when it is in line with the connecting rod and not exerting torque	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')