Guided by street tree guru Joe Coles, we explore the trees of Leeds, including Woodhouse Ridge, a pocket of urban woodland, some of Leeds' tree-lined streets and the London plane tree in Dortmund Square. Along the way, we meet Justin Williamson, woodland officer for Leeds City Council, and Dr Catherine Scott from Leeds University to chat about how trees affect air quality, urban trees as wildlife corridors, the benefits of green spaces for people and how cities will become part of the new Northern Forest.