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Blue John 'discovered after 68 years'

Duration: 03:24

Mr Harrison explains how a seam of Blue John stone was found after 68 years of looking.

Available since: Tue 6 Aug 2013

This clip is from

Today 06/08/2013

Morning news, including NHS 'zero harm' plans and giant 'fatberg' found in sewer.

First broadcast: 06 Aug 2013

Image for 06/08/2013 Not currently available

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