94079813_CSC___Safety_documents__Notes
[Issue] AAIB Investigation report into a failed take off at Rochester [Notes] 
Although this accident report is from the powered flying world, it describes an interesting situation where a qualified pilot, needing a regular check flight, was assessed by her old instructor. The important point is that the student dropped back into "I am a student now" mode whereas the instructor assumed he wasn't instructing, he was doing a check ride.
CSC - Safety documents
Notes