Deadwood is a vital component of a properly functioning forest ecosystem. It plays an important role in sustaining biodiversity and in delivering ecosystem services such as soil formation and nutrient cycling. In the UK up to a fifth of woodland species depend on dead or dying trees for all or part of their life cycle and many of these species are rare or threatened. This Practice Guide has been written for the owners and managers of forests and woodlands who want to increase the value of their woodlands for biodiversity. It provides advice and practical guidance on managing deadwood to support sustainable forest management and the UK Forestry Standard Guidelines on Forests and Biodiversity.