Solid as a Rock
Salt Union Ltd is Britain's largest supplier of natural rock salt which is used by local authorities to thaw icy roads in wintry weather. After being mined and reduced to specific granule size, this natural mineral is put into 'gritters', with spreading usually taking place on a precautionary basis, before ice has formed, following weather warnings.

Rock salt from Salt Union Ltd plays a major role in protecting life and keeping roads open in icy weather. Part of Compass Minerals, a worldwide leader in the production and distribution of inorganic minerals, Salt Union Ltd is based at the Winsford Rock Salt Mine, in Cheshire, from where it is capable of supplying more than 100,000 tonnes a week during severe weather. The company works in partnership with local authorities in many parts of Britain in finding practical solutions for the local supply, safe storage and spreading of rock salt.