The north-south interconnector faces another challenge as a group of around 150 farmers and landowners in counties Armagh and Tyrone are trying to overturn planning approval for more than 100 pylons to carry overhead cables for it.
The 138km line will cross the border in Co Monaghan and then through Cavan to Meath, with more than 300 large pylons in the Republic and over 100 north of the border.
A judicial review is being taken by Safe Electricity Armagh and Tyrone (SEAT), challenging the decision to grant planning permission for the pylons and a huge substation on the outskirts of the village of Moy.
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