Richard Bowker visits Network Rail's Wales and Western region to spend the day with Route Director Nick Millington MBE. It's a fascinating day of learning about the challenges of weather resilience on Britain's railways, the devastating effects of climate change, the complexities of managing trees and vegetation on the lineside... and surprisingly, about dormice. How does Network Rail manage flood risk? How are trees on the railway managed? What rules are there to protect habitats adjacent to the railway? This is the first in a new series of podcasts from Green Signals where we seek to share knowledge and expertise from around the railway and, hopefully, to explain some of the things that many people don't know that much about!