Green’s Dictionary of Slang

colney (hatch) n.

a match.

1932		‘P.P.’ Rhy. Sl.
1938		J. Curtis They Drive by Night 275: Want another fag? Cop. You got them colneys still?
1964		R.S. Gold Jazz Lex. xxiii: British formations in which the meaningful word, whether slang or standard, is usually replaced by a nonsense rhyming one: e.g., Kangaroo: a Jew; don’t make a fuss: a bus; down the drains: brains; Colney Hatch: a match.
1972		Dodson & Saczek Dict. of Cockney Rhy. Sl.