Parents of children with autism say they need clarity on the functions of Irish Autism Action.

They're calling for a full investigation by the charity regulator - following revelations in recent days.

It's after the group's CEO revealed last week that they have NOT written a 2016 budget.

Meanwhile concerns are also being raised about the helpline it provides.

Irish Autism Mammy's represents 1,500 families - spokesperson Jacqueline Moran says they need answers: