The RSSB funded research project ‘Tomorrow’s Railway and Climate Change Adaptation’ (T925), published in November 2011, provided information on the vulnerabilities of the GB railway to projected climate change. Where possible, it gave indications of the degree of change in risk. This first study highlighted the significance of research and knowledge constraints affecting the understanding of the impacts of climate change, and the consequential affect on decisions for investment and management of the railway, hence the decision to undertake further research.Phase 1, started in January 2013, has delivered a compendium of current research that has been shared with the industry via the RSSB SPARK platform. It has also delivered a series of recommendations which have been prioritised by the industry. Some of these recommendations were taken forward by Phase 2. Phase 2 ran through to May 2016 and built upon Phase 1, delivering a step change in our understanding of climate change, identifying potential cost-effective and timely actions, and outlining decision making tools that will aid climate change adaptation. The project has provided a range of decision making tools and information which will enable the railway to become more resilient. The tools include methods for financially evaluating climate adaptation investments, geospatially based methods to integrate many of the metrics currently captured by the industry, and systems tools to provide insight into critical interfaces and dependencies, inside and outside of the railway system.