Tungsten West plc chairman Robert Ashley has retired with immediate effect.
He is replaced by David Cather.
Mr Ashley joined the company in September 2021 and led it through its initial public offering.
“On behalf of the board and the company, I would like to thank Rob for his considerable efforts in our journey to restarting Hemerdon, which continues to advance,” said executive vice chairman Mark Thompson.
“We wish him all the best in his retirement.”