The Whyalla steelworks of troubled steel and mining group Arrium is rife with duplication and waste, a former worker says.

The man, who was made redundant from an engineering role earlier this year and doesn’t want to be named, has written to Arrium and administrators KordaMentha with various cost-saving suggestions but says they haven’t been acted on. In a series of emails seen by AAP, he says the steelworks uses…