The Prime Minister says Bill Shorten can’t keep dodging questions about his time as a union official, amid claims the Labor leader signed deals that disadvantaged workers.

The Royal Commission into Trade Unions has heard Mr Shorten oversaw workplace agreements which allegedly left staff in various industries worse off.

The Opposition Leader says he always acted in the best interest of workers.

But Tony Abbott says there are still questions to answer.

Gary Adshead spoke with Macquarie Radio Federal Political Editor Michael Pachi.