Don't really know the full story here apart from this:

"Christine Ohuruogu was suspended from competing in the 2006 European Athletics Championships. The reason for this was that she missed three out of competition drugs tests, one in October 2005 and two in June 2006. According to IAAF and British Olympic Association rules, she received a one-year ban for missing these tests. The British Olympic Association also banned her from competing at future Olympic Games for Great Britain. She appealed to the Court of Arbitration for Sport, but the original decision was upheld. She appealed against her Olympic ban and it was overturned on November 27, 2007. She also stated that she would probably leave Britain and compete in the Olympics for another country if her appeal was unsuccessful.
Her one-year ban was completed on the original date of 5 August 2007."

Just wondered if anyone can remember what the general reaction of the athletics community was when this happened as they all seem to love her now she's won a gold

Was this a precedent ruling and WHY did she miss the 3 tests??

I probably seem like a kill-joy but I'm sincerley interested in the history & fairness of the decision