Sports Direct's founder Mike Ashley has admitted workers at its Derbyshire warehouse were paid below the minimum wage and its policy of fining staff for being late was unacceptable. HMRC is investigating the firm over the minimum wage issue, Mr Ashley told MPs. An internal investigation had discovered "some issues" with working practices at the warehouse, which he had "hopefully" addressed, he said. The firm had "probably" outgrown his ability to run it, Mr Ashley agreed. He said much of what he'd found out, after starting an internal investigation into how staff were treated at its Shirebrook distribution centre six months ago, was an "unpleasant surprise".