Test Advice: Backup Plan
Just in case...
The video (from Standards Check Success) advises ADI's to have a back up customer just in case they are let down on the day.
This is less likely to happen for Part-Three unless you are working on a Trainee Licence and have chosen a 'regular learner'. If you are using a friend or family member it's perhaps unlikely that they will let you down.
Next: The lesson theme...