Conducting an Interview

[solo2]

I've finally got the go ahead to get a much needed assistant and I need to interview people for the role. It's just a boring Admin related post but I've never interviewed anyone before, always been on the other side of the table, and interviews I've had have differed vastly from the hungover bloke more interested in ordered a bacon buttie with his colleague to the uptight woman who appeared so ill at ease that it made me the same.

I've drafted an inital prompt list of questions starting with company overview, that it's a new role to be developed by the person appointed and the reasons why the role has come about. I have some other questions but not totally sure what you can, and cannot ask. Are you allowed to ask them about their actual current salar,y or only ask what they want to move jobs and the reasons they want to move?

What else should I ask?