The simple equation is that cash costs of production are higher...

The simple equation is that cash costs of production are higher than the average selling price.
Unsustainble for too long. Some of the costs were capitalised, however, net/net still unprofitable accounting for this - at a time of record high gold prices.

You are correct in that the Western zone, coupled with right-sizing of the workforce is the prudent option to make this business profitable.

If it cannot be turned arund in 6 months - 12 months tops - nothing will help BCD or MAK.
Neville Bergin was a senior manager at Goldfields Aust, so hopefully he has the mettle to make the required changes.