David Sciasci News Today

The head of the federal government department tasked with overseeing Parliament House has flatly denied he was in a relationship with his deputy while he was her boss. But he has refused to tell Senate estimates if the two had a relationship before or after working together.

Senators have spent the day debating transparency and "vexatious" questioning at estimates hearings.

Billy had to travel interstate to see a specialist about his ADHD, but in the future he might be able to see a local GP.