Ordnance Survey 10km square grid of Great Britain showing the year that Chalara Fraxinea infections were first confirmed in the wider environment in that grid square.
Year - Year that an infection was discovered and confirmed.
For more information see website: http://www.forestry.gov.uk/chalara
For most interactive map see website: http://chalaramap.fera.defra.gov.uk/ Attribution statement: Contains OS data © Crown copyright [and database right] [year].
