OUTSPOKEN Sydney radio host Mike Smith has been stood aside after a week of controversy over old allegations of impropriety concerning Julia Gillard and her relationship with former Australian Workers Union official, Bruce Wilson.

Smith, a host on 2UE, a radio station owned by Fairfax Media, was the subject of a critical review on ABC Television's Media Watch program on Monday night.

Mike Smith.

The 2UE presenter has been trying for more than a week to broadcast an interview he recorded with former AWU president Bob Kernohan - but station managers have stopped him.

Smith made his frustrations clear on air, indicating he was effectively in dispute with his employers over the interview.