UK rock salt grit comes from here: https://www.saltassociation.co.uk/education/make-salt/rock-salt-production/ https://www.saltassociation.co.uk/education/make-

UK rock salt grit comes from here: https://www.saltassociation.co.uk/education/make-salt/rock-salt-production/ https://www.saltassociation.co.uk/education/make-salt/rock-s... The UK's biggest rock salt mine is in Winsford in Cheshire https://en.wikipedia.org/wiki/Salt_in_Cheshire https://en.wikipedia.org/wiki/Salt_in_Cheshire https://en.wikipedia.org/wiki/Winsford#Rock_salt https://en.wikipedia.org/wiki/Winsford#Rock_salt Additionally part of the mine is now used as a deep secure store for files from the health service.