The Supreme Court dismissed Dominic Dunne’s appeal against a High Court ruling on legislation governing works affecting Carrickmines Castle and the completion of the South Eastern Route of the M50. The Court held that the Minister’s directions for archaeological works did not amount to a new road consent requiring a further environmental impact assessment under the EU directives at issue.
The case concerned section 8 of the National Monuments (Amendment) Act 2004. For works connected with completing the South Eastern Route, that provision removed the need for consent or licences under the National Monuments Acts and required works affecting a national monument to be carried out on the Minister’s directions. It also disapplied a Roads Act provision that could otherwise allow An Bord Pleanála to require an environmental impact statement.
The road scheme had received approval in October 1998 following an environmental impact statement prepared in 1997. Archaeological excavations at Carrickmines Castle began in 2000. After further legal proceedings, the Council applied in July 2004 for ministerial directions concerning outstanding archaeological works. Directions were issued on 5 August; the Minister’s department agreed the Council’s method statements on 12 August.
Dunne argued that section 8 was unconstitutional, including because it delegated legislative power to the Minister, and that the section and the directions breached EU environmental assessment requirements. He also sought to restrain interference with the monument. The respondents maintained that the directions concerned archaeological mitigation and did not alter the approved road development.
The Supreme Court held that the Minister’s power to issue directions was an administrative discretion, not delegated law-making. It remained open to challenge by judicial review under ordinary administrative law principles. The Court also rejected the constitutional arguments based on Articles 5, 10 and 40, finding no basis to overturn the legislation on those grounds.
On the EU-law challenge, the Court treated the road development as the relevant project and the 1998 decisions as the principal development consent. It found that the 2004 directions regulated how necessary works were carried out; they neither changed the road project nor authorised it to proceed. The Court upheld the finding that the plaintiff had not established a change or extension likely to have significant adverse environmental effects, and said the adequacy of the 1998 assessment could not be challenged in these proceedings.
The Court concluded that the directions were not a development consent under the directives and that their implementation would not breach them. It also found no need to refer questions to the European Court of Justice. The order was to dismiss the appeal. The judgment does not state a separate ruling on the requested injunction.