The document summarizes lessons learned from major UK rail infrastructure programs. It discusses two myths: 1) that the National Audit Office only reports when things go wrong, and 2) that lessons are not learned from past programs. The document then analyzes five rail programs to identify common issues, such as developing realistic business cases and program plans, integrating delivery arrangements, and fully evaluating benefits realization. It concludes by asking why some lessons are more difficult to learn than others.