National Australia Bank allegedly withdrew a job offer because it found out that the woman it had offered the role to was pregnant, according to a new court claim, which has also alleges that a branch manager made a number of sexist remarks that humiliated her.

The claim raises questions about the internal culture at NAB, the nation’s largest business lender, as it prepares to fight another unfair claim that alleges a “boys’ club culture” permeated its Sydney trading floors.