AN Form: Proof of living in the UK for Mrs

I am EEA national with PR and Settled Status, my wife non-EEA national with PR and Settled Status.

I have been in the UK working since 2005 and my wife joined me in 2008. She does not work.

What evidence should I supply with the AN form when asking for: Proof of living in the UK for my wife?

Do you have official documents with her name or both your names on it?
Council tax bills would be acceptable, as well as other official communications such as chilb benefit / child tax credits, HMRC letters, etc.