Do not think you can call Drug Testers numpties ,the rider obviously failed a standard procedure and that’s the end of story for that particular night .Subsiquently they have found out what he has taken(co-codimol) it might had banned substances in it which would explain the result.Whether he was fit to ride on the night will always be in dispute in this situation.Inconclusive is the result of test and he has been cleared ,end of story.