Current waiting lists and access to services for children are not appropriate to where Ireland is as a nation, Chief Commissioner of the Irish Human Rights and Equality Commission has said.

Speaking on RTÉ's Morning Ireland, Sinéad Gibney said thresholds which determine the rights of children, are under threat.

She said: "Sometimes it's quite surprising where we might rank in comparison to other countries.

"Given the status of Ireland as a wealthy democratic nation, we really are coming up very short in terms of things like access to services for mental health, for young people, assessment of needs, and so on.

"There are a lot of ways in which we are really not meeting those obligations under the convention of the rights of the child."

Later today, Minister for Children, Equality, Disability, Integration and Youth, Roderic O'Gorman will lead a State delegation that will appear before the UN Committee on the Rights of the Child in Geneva.

It is part of a two-day public meeting examining children's rights in Ireland.

This will be the first review of Ireland's performance on children's rights since 2016.

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Ms Gibney said it is difficult to monitor Ireland's obligations in human rights and equality because the Irish State is very poor at collecting data detailing the very specific experiences of different groups in Irish society.

Examples of this would include access to services or experience within the criminal justice system, she said.

"We are missing the baseline data," Ms Gibney added.

There is a disproportionate representation of Roma and Traveller children experiencing exclusion from schools, she said.

"What happens is that schools, when they feel that they don't have the resources to meet the needs of a particular child or a group of children - and normally these would be children who are disadvantaged who might have additional complex needs - instead of providing more for that child, [schools] will restrict their access to education as a response," she told the programme.

This is a "problematic situation" that children with complex needs fall into, Ms Gibney said.

The HSE is to begin a review of all open Child and Adolescent Mental Health System cases this week focusing directly on children and adolescents who have not been monitored for six months or more.

It follows a report by the Mental Health Commission which has highlighted significant deficits in the Child and Adolescent Mental Health System (CAMHS).

Meanwhile, the chair of the IMO consultant committee said the problems in child psychiatric services, and in psychiatric services in general, will not be solved by a new consultant contract.

Professor Matthew Sadlier said there are significant structural difficulties with the design of mental health services that make it difficult to recruit staff to the area and "the contract by itself is not going to solve this problem".

Speaking on the same programme, he said mental health services need a structural reform from the bottom up.

In addition, there is a significant problem in the definition of a child, he said, as medical services define a child as someone under 16 but mental health services define a child as someone under 18.

This results in children turning up to adult emergency departments with mental health issues where there are no child and adolescent psychiatry services, he said.