Alan Ashworth, Deborah Gudgeon and Adrian Reynolds have all been appointed to the board with immediate effect, while Mike Kenyon and André Falzon will step down at the end of July.

Ashworth's has been in the mining industry for more than 40 years, with the majority being spent with De Beers, where he was general manager of Namdeb in Namibia, head of South African operations and head of Tanzanian operations.

He also spent a couple of years as managing director of Gold Fields' Ghanaian operations, before becoming COO of Gem Diamonds until retirement.

Gudgeon has 30 years' experience in accountancy and most recently worked as managing director of Gazelle Corporate Finance. Prior to this she was a founding director of BDO's special situations advisory team, a director at Deloitte and a director of Halstead Services.

She is also a non-executive director of EVRAZ.  

Reynolds has over 30 years' experience in the natural resources sector, with half of his career spent at Randgold Resources where he was part of the executive team that grew it from an exploration company to a profitable mid-tier mining company.

He is currently an independent consultant and a non-executive director of Geodrill Limited and is a non-executive director of Mkango Resources.

Reynolds was formerly non-executive chairman of Digby Wells Environmental and a non-executive director of Aureus Mining.

Ashworth and Reynolds will both join the EHS&S and technical committees with Ashworth to chair the former and Reynolds to lead the latter.

Gudgeon will join the Acacia audit, compensation and nomination, and governance committees, and will chair the ausit committee.