Green’s Dictionary of Slang

cab rank n.

a bank.

1972		Dodson & Saczek Dict. of Cockney Rhy. Sl.
1981		P. Wright Cockney Dialect and Sl. 104: I’m goin’ to the cab rank (bank).
1998		R. Puxley Fresh Rabbit.
2002		B. Kirkpatrick Wicked Cockney Rhy. Sl.