The "sky is the limit" for Arrium's Whyalla Steelworks with the plant having the long-term potential to expand its capacity 10-fold, British industrialist Sanjeev Gupta says.

Mr Gupta plans to invest heavily in the steel operations in South Australia’s mid-north once his company, GFG Alliance takes charge of Arrium’s Australian operations. “Even our immediate, short-to-medium term plans see us investing well over $1 billion here,” he said after touring the plant and meeting workers on Monday….