Sir Steve Redgrave took to radio to explain how an MPs report into Sir Bradley Wiggins and Team Sky gaining permission to take banned drugs for medical need crossed 'an ethical line'.

The Digital, Culture, Media and Sport select committee report said cyclist Wiggins and Team Sky got permission to use banned drugs for medical use but used them to enhance performance.

Wiggins, who has asthma, and Team Sky have rejected the report's findings.

And Marlow Bottom resident Redgrave said the fact no rules were broken meant the problem lay with the system, not Wiggins or his team.

He told BBC Radio 5 live's Sportsweek programme: "To me, it's black and white. It's either a positive drug test and you are cheating or you're not cheating and everything's OK."

Wiggins and Team Sky received therapeutic use exemptions (TUEs) - permission to take otherwise banned drugs for medical use - to treat the 2012 Tour de France winner's asthma with anti-inflammatory drug triamcinolone. The drug is legal to use out of competition.

Wiggins, 37, was granted TUEs to take the corticosteroid shortly before the 2011 Tour de France, his 2012 Tour win and the 2013 Giro d'Italia.

He took it up to nine times over a four-year period, said the report, which was produced following a lengthy inquiry into doping in sport.

This was done "not to treat medical need, but to improve his power-to-weight ratio ahead of the race" as the drug has "powerful" performance-enhancing properties, it added.

Former Team Sky and British Cycling coach Shane Sutton told the committee "what Brad was doing was unethical but not against the rules".

UCI president David Lappartient told BBC sports editor Dan Roan last week he wanted the governing body to investigate whether Team Sky broke anti-doping rules after the report's "unacceptable" findings.