An Bord Pleanála has refused planning permission for a wind farm near Pettigoe in Co Donegal.
The refusal follows an appeal by the environmental group An Taisce, and concerns expressed by the Northern Ireland Environment and Heritage Service.
The cross-border representation was made during what is termed as 'the trans-boundary consultation process', and is the first time An Bord Pleanála has cited such a factor in its decision making.
The wind farm, which was to consist of 12 wind turbines up to 65 metres in height, was passed by Donegal County Council in September of last year.
However, An Bord Pleanála has overturned the decision because the farm was proposed to be sited overlooking Lough Derg and close to designated areas of natural heritage significance.
