Lenders Barclays, Investec and Scotia included an accordion feature in the revolving credit facility, worth a further US$30 million.

Anglo said the increase "reflects the group's additional borrowing capacity associated with the significant increase in volumes and revenue from Kestrel, along with the additional US$75m (£62.5m) of income producing assets acquired in 2019".

Income from the Kestrel coal mine in Queensland, Australia, for the first nine months of 2019 amounted to £30.3 million up 36% year on year.

"With over US$75m of liquidity potentially available, we are in a strong financial position to continue growing and diversifying our portfolio," the company's CEO Keith Flynn said in a statement.

London-listed Anglo Pacific's share price stood at 173p on Wednesday, down from just under 200p mid-December. The company's market capitalisation is £315 million.