About 10 years ago my son undertook a course for his PPL, which was something he had long dreamt about. Everything went very well until his QXC. A/c unserviceability, poor planning by the club, his working shifts, weather problems, moving house, etc., meant that he booked 13 times before managing to do it. He flew from Southampton to Bristol - all OK. When he got to Exeter the wind had changed aso it was outside his limits and he had to divert back to Southampton without landing. Sadly, that was the end of his PPL as he gave up after that..