Team Sky have admitted "mistakes were made" in relation to anti-doping and medical practices during the 2011 Criterium du Dauphine but insist they have not broken any anti-doping laws.
The World Tour cycling team are currently subject to a UK Anti-Doping (UKAD) investigation to establish whether the team - and British Cycling - violated rules during the race six years ago when a package was sent to the team doctor from the UK.
Although the team's record-keeping has come in for criticism, principal Dave Brailsford has vehemently denied any rules were broken and received backing from a number of Sky's riders and the team bosses.
In a letter to Culture, Media and Sport select committee chairman Damian Collins, made public by Team Sky on Tuesday, Brailsford acknowledged faults on the part of the team in 2011 but again insisted there had been no wrongdoing and reiterated his commitment to "race and win clean".
"The events of recent months have highlighted areas where mistakes were made by Team Sky," Brailsford wrote.
"Some members of staff did not comply fully with the policies and procedures that existed at that time. Regrettably, those mistakes mean that we have not been able to provide the complete set of records that we should have around the specific race relevant to UKAD's investigation.
"We accept full responsibility for this. However, many of the subsequent assumptions and assertions about the way Team Sky operate have been inaccurate or extended to implications that are simply untrue.
"There is a fundamental difference between process failures and wrongdoing. Our commitment to anti-doping has been a core principle of Team Sky since its inception. Our mission is to race and win clean, and we have done so for eight years.
"UKAD's investigation was precipitated by a very serious allegation of an anti-doping rule violation by Team Sky at the 2011 Dauphine. It is important to reiterate that, to my understanding, UKAD's extensive investigation has found nothing whatsoever to support this allegation, which we believe to be false.
"2011 was only our second year of racing and we have continuously improved our policies and procedures since then. We have taken a number of significant steps to strengthen our anti-doping and medical governance, and we will continue to do so in the future."