Provides a national-scale summary of the presence of mining in Great Britain and an indication of the level of hazard associated with old workings.

The data has been generalised from the BGS Mining Hazard dataset into a vector map of interlocking 1km hexagon cells (area c.2.6 km2) with four classes:

- Low: localised, small-scale mining may have occurred
- Moderate: small-scale, underground mining may have occurred
- Significant: underground mining is known or considered likely to have occurred
- NA: no record of activity

Note: The 'full' BGS mining hazard (not including coal) dataset is also available on request and provides further detail at a 1:50 000 scale, including information on the type of commodity extracted, mine names and any additional details where available.