This spreadsheet is the underlying data for the biodiversity indicator B1b, Area of forestry land certified as sustainably managed.
Woodland certification assesses management practices against agreed environmental standards. Certification requires that wood products are harvested legally and sustainably, and that important wildlife habitats are identified and are not negatively impacted by management.
The indicator shows the percentage of the woodland area in the UK that is certified against agreed environmental standards, derived from the areas reported on certificates and more detailed assessment of selected certificate holders. The short-term assessment is based on a three-year average from the point five years back from the latest year. Certification in the UK began in 1996, and data collection started in 2001, with regular data collection taking place from 2004.
This is one of a suite of 24 UK biodiversity indicators published by JNCC on behalf of Defra; the latest publication date was 19 January 2016 - for indicator B1b the latest data are for 2015.