It appears besieged MP Barry Urban may have covered one apparent lie with another during his speech to Parliament on Thursday.

The member for Darling Range was forced to front Parliament to address allegations he had lied about obtaining two university degrees and investigating war crimes in Bosnia during the 1980s and 1990s.

Barry Urban with Premier Mark McGowan. Credit:AAP

The MP remained silent on both allegations, claiming he needed more time to "substantiate" his degrees and UK army history.

He did, however, reveal he had lied about completing a diploma in local government, telling Parliament he completed "nine out of the ten modules".