In the wake of the KPMG audit leak scandal, executives from Macquarie, Westpac, Optus and Dexus cast doubt on their faith in the auditor.

One of Australia's big four consultancy groups is facing the Senate again over its whistleblower scandal. Follow live.

KPMG clients, executives face will face a parliamentary inquiry from 8.15am; witnesses include Macquarie chair Glenn Stevens and KPMG’s new CEO John Sams. Follow updates here.