A “deeply discontented” Lendlease chairman John Gillam has accused long-standing auditor KPMG of breaching 68 years’ worth of trust in the audit scandal.

As internal documents undermine the firm’s defence, it has initiated an urgent data purge and mandatory compliance training to restore client trust.

Construction giant Lendlease has slammed accounting firm KPMG over claims confidential client documents were misused, as a parliamentary hearing into the scandal is held on Friday.