Addition of the Skouries gold-copper mine in northern Greece will boost Eldorado's output to 675,000-735,000 gold ounces by 2027.

The miner estimates it will spend $1bn per year to bring Woodsmith into production by 2027, both a higher cost and longer timeframe than previously expected.

A new material class with above-average conductivity could lead to the development of high-performance solid-state batteries.

Rio's bottom line was hit by weaker iron ore prices as demand from China slowed, as well as higher labour and material costs.