Sir Bradley Wiggins and Team Sky cycling are facing a probe from the UK anti-doping agency after claims that a medical package was delivered to the team's officials before the 2011 Tour de France.
Team Sky principal Sir Dave Brailsford has previously admitted to getting special permission for Wiggins to receive injections of a banned drug before three major races between 2011 and 2013, a decision which he defends to this day.
The cyclist used triamcinolone, a strong anti-inflammatory drug, on the eve of the 2011 and 2012 Tour de France races, and the 2013 Giro d'Italia.
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Wiggins has since denied any wrongdoing and was granted therapeutic use exemptions (TUEs) on all three occasions.
TUEs allow athletes to use otherwise banned drugs to treat problems before a competition and are signed off by the necessary anti-doping agencies and sports federations beforehand.
Britain's most decorated Olympian claims he took the drug to deal with a pollen allergy that aggravates his asthma.
The TUEs were approved by the UCI, cycling's world governing body, so there can be no suggestion that he or Team Sky broke any rules on that account.
However, the UK anti-doping agency is investigating new allegations, centered specifically around a medical package delivered before the 2011 Tour de France, and aim to find out if it was requested by Team Sky doctor Richard Freeman to treat Wiggins.
The seven-time Olympic medalist and 2012 Tour de France winner has a great reputation in Britain and will be hoping these allegations are unfounded.
Team Sky has a zero-tolerance policy towards doping, and should the investigation find anything underhand, both Freeman and Wiggins will have more explaining to do.