The future of Britain's biggest coal company which employs hundreds of people across the Calendar region is under scrutiny this afternoon. UK Coal has refused to comment on reports that it's seeking voluntary liquidation.
The firm's been struggling since a huge fire destroyed it's main pit in the Midlands. David Hirst has more from Kellingley Colliery.
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The walls had been closed to the public at the weekend amid fears of a collapse.
The artwork will act as a sundial, highlighting up to 24 key dates that have shaped the history of Hull and the world.
The latest forecast from Jon Mitchell