[6][7] The project is a joint venture between the Irish transmission system operator (TSO) EirGrid and French TSO Réseau de Transport d'Électricité (RTE) for the purpose of improving security of supply, reducing consumer electricity costs and supporting the development of renewable energy.

[8] This included an economic assessment, environmental considerations and will determine the placement of the cable and onshore stations, while a decision initially due on the project is foreseen for 2020 or 2021.

[11] In May 2018, the project was granted a foreshore license to begin marine surveys for the potential landing sites at Ballinwilling, Claycastle and Redbarn beaches, County Cork.

[12] In 2018, the project was given preliminary approval for European Investment Bank funding as part of preparations by Ireland for Brexit,[13] for €530 million.

[15] Three potential landing sites on the Cork coast were identified and six locations (Ballyadam, Leamlara, Knockraha, Pigeon Hill, Kilquane and Ballyvatta) were under consideration for the HVDC converter station.

[3][20] In October 2023 RTE had started work in La Martyre on the converter station there called Ar Merzher.