The Union of Fathers says a new family court model is a small step in the right direction, but warns there is still a long way to go.

The Government is trialling a non judge-led mediation service aimed at resolving custody and access issues.

The Union of Fathers says public debate is needed so the country can get it right on behalf of New Zealand children.

Spokesman Jim Bagnall says any changes to the system need to ensure fathers have a fair say in proceedings.

He says there needs to be a fundamental law change to create a rebuttable presumption of shared parenting, with real evidence needed for another outcome.