Earlier today, it was confirmed that Team Sky rider Jonathan Tiernan-Locke will face disciplinary proceedings over an anti-doping violation.

Analysis of his blood passport showed erroneous blood values related to last year - before he joined Team Sky.

To get some background on the issue and find out how the news affects Team Sky, we spoke to VeloNation's Shane Stokes who detailed the ins and outs of the issue.

"When the story was first reported by the Sunday Times in September, it was said that the erroneous blood value related back to last year's Tour of Britain prior to joining Team Sky. The suggestion has been that since that blood value, things have been different," said Stokes.

"The inference was that something was going on last year and that his blood values have been more normal this year. The suggestion was that perhaps he was behaving himself this year and wasn't last year. I spoke to his Endura team manager Brian Smith and he said that he has issues with the story that was put out that the blood value came from last year's Tour of Britain. He said that Tiernan-Locke wasn't blood tested at all in last year's Tour of Britain nor was he tested in any of his races last year. He was competing for a continental team that wasn't part of the biological passport. So he failed to see how it could be the case that the Tour of Britain threw up the erroneous reading."

But how does this affect Team Sky who have had their reputation questioned?

"Brian Smith told me that he won the Tour of Britain in September, but that the agreement was already in place to join Team Sky before then and that the team had given him early indication that they were going to take him on. You have to wonder why the team didn't blood test him every two weeks, do their own testing and build up a profile and get a real estimation of where he was coming from. If they didn't do that, you really have to worry about this due diligence and this idea of doing things better than other teams."