In this episode of Lunch with Leon, rail veteran Nigel Holness reflects on his 40-year career, from his early days as a signalling consultant on the London Underground to his current role as a leading transport consultant, advising on major global projects. Leon and Nigel discuss TfL's evolution, their experiences of the 7/7 London bombings, 2012 Olympics, and the establishment of the Elizabeth line. Nigel also shares his perspective on the challenges of systems integration and battery operation in rail.