The Australian company reported a net profit of $8.11bnfor the six months to December, up 83% from $4.43bn a year earlier.

Stripping out one-off items the underlying profit rose by 31% to $7.8bn.

“A substantial improvement in productivity and additionalvolume from our low risk, largely brownfield investment program contributed toa significant increase in profitability in the December 2013 half year,” thecompany said in its earnings statement.

“The