A man has died after a suspected 'gas blow-out' at Boulby Potash mine in East Cleveland.
The incident happened early on the morning of June 17.
A gas blow-out is described as being "a sudden and powerful release of gas."
Unite the union has called for prompt investigation into the death of one of their members at Boulby potash mine in Middlesbrough.
Unite regional officer Tim Bush said:
"I would personally like to thank the local community for their amazing donations of food, toiletries and clothing. "
Owners John and Irene Hays say there is ''light at the end of the tunnel'', after the pandemic forced them to close 650 UK stores.
There has been resistance to calls to dismantle memorials to the explorer.