And AIC 127/1999 which you quote says:
"Where the standard was sound and there was no need for instruction or where instruction took place during the course of the flight and the final standard reached was satisfactory, then the instructor should sign the log book and record the flight as dual training."
If you listen at these seminars with the same attention to detail with which you read AICs, no wonder you're giving information here that flatly contradicts the contents of the CAA's own GID!
PIC U/S can only be logged (in a single pilot aircraft) when undergoing a flight test with a successful outcome.