This investor-state dispute, brought by Singapore-based Woodhouse Investment Pte Ltd and its UK subsidiary West Cumbria Mining (Holdings) Limited against the United Kingdom, concerns the development of a new underground metallurgical coal mine in Cumbria, England. The claim was registered with ICSID on August 8, 2025, under the 1975 Singapore-United Kingdom Bilateral Investment Treaty. The case arises from the ultimate failure of the project to proceed after its planning permission was quashed by the UK's High Court following significant legal and environmental challenges. The project, known as the Woodhouse Colliery, was granted planning permission by the UK's Secretary of State on December 7, 2022. It was intended to extract and process over 60 million tonnes of coking coal for the steel industry over a nearly 25-year period. The decision was immediately met with controversy and became a focal point for debates on UK climate policy. Environmental organizations, including Friends of the Earth and South Lakeland Action on Climate Change, launched judicial review proceedings in the High Court, arguing that the government's approval was unlawful. The central legal issue in the domestic litigation was the government's assessment of the project's climate impact under the Environmental Impact Assessment (EIA) regulations. The claimants argued that the Secretary of State had failed to properly account for the 'indirect effects' of the mine—specifically, the significant greenhouse gas (GHG) emissions that would result from the end-use combustion of the extracted coal in steel-making furnaces. This argument was substantially strengthened by the UK Supreme Court's landmark ruling in R (Finch) v Surrey County Council, which established that such downstream emissions are a mandatory consideration for EIA purposes. In its defense, the government and the developer, West Cumbria Mining (WCM), relied heavily on a 'substitution' argument. They contended that the coal from the Cumbrian mine would merely replace coal imported from other countries, primarily the United States, and therefore would not lead to a net increase in global GHG emissions. They further argued the project could even be beneficial, citing reduced transport emissions and the mine's operational 'net zero' commitments. However, the High Court, in a detailed judgment dated September 13, 2024, found this reasoning to be legally deficient. The court held that the Secretary of State had failed to adequately scrutinize the substitution claim, particularly the critical question of whether displaced US coal would remain unmined or simply be sold to other growing markets, such as those in Asia. The decision was found to be based on inconsistent logic and an incomplete assessment of the project's global climate impact. Consequently, the High Court quashed the planning permission, effectively halting the project. Following this adverse judicial outcome, the investors initiated the ICSID arbitration. The arbitral tribunal was constituted on November 18, 2025, comprising Juan Fernández-Armesto as President, and arbitrators Michael Pryles and Sean D. Murphy. The seat of the arbitration is Paris, France, and the proceedings are governed by the 2022 ICSID Arbitration Rules. The case is currently in its initial phase, with procedural orders issued to establish a timetable for the submission of memorials and subsequent hearings scheduled for 2026 and 2027.