When it came to power this government pledged to be the most open and transparent ever.

Now an investigation by the Chief Ombudsman's will effectively show whether or not that's true.

Judge Peter Boshier's probe will look at whether the Official information Act is being weaponised to delay or stifle the flow of information with some govenment agencies routinely leaving it to the last possible moment to respond.

He will also be delving into the role Ministers play in process and whether there is any evidence of "interference".