An Taisce has warned the Government of potential planning risks with the location for the new National Children's hospital.
It has written to the Taoiseach Enda Kenny to express its concern over the risks of building the hospital beside St James' Hospital without a maternity hospital nearby.
The Minister for Health James Reilly had hoped the project would be completed by 2016, but a planning issue over the original chosen location beside the Mater Hospital means it now will not be complete until 2018.
The fact that the hospital will not be co-located beside a maternity hospital, at least at the start, means that sick children will need to be transferred from a maternity hospital after birth to the new children's hospital by ambulance.