Work on the construction of an M50 roundabout, over part of the medieval Carrickmines Castle site in south Dublin, has been stopped pending the outcome of a judicial review.
Today at the Supreme Court, Dun Laoghaire/Rathdown County Council gave undertakings not to enter the lands at Carrickmines until a determination had been reached.
The High Court will tomorrow morning commence the judicial review of Environment Minister, Martin Cullen's decision to give his consent to the partial destruction of the Castle ruins.
The judicial review will centre on whether a 1996 Order, employed by Mr Cullen, went beyond the power granted under the original legislative act.
In allowing the appeal, the Supreme Court overturned a High Court ruling that conservationist Michael Mulcreevy, of Killarney, Co Kerry had not brought his case sufficiently promptly.
