Chalara fraxinea is a disease that has decimated Ash tree species throughout Northern Europe, already affecting over 90% of Ash trees in Denmark and Sweden and is present as far as Belgium. Until recently the UK was unaffected, but it now seems that imports of Ash saplings have released the disease into the wild, and at least two outbreaks have been spotted in wild woodland in Norfolk & Suffolk.

A video is available on Ashtag.org to help identify the disease and report suspect trees.