Bolleaux!
He did well to do his Q X-C and should be praised for that.
But chart prep is an essential part of navigation training and that clearly has NOT been taught properly.
I would never let anyone go off on any navigation exercise with such a poorly marked chart. Perfectly good visual fix points (such as Spitalgate) have been ignored, instead the stupid 1/2 mark in the middle of nowhere has been used. The chart should be the primary reference, not the silly 'PLOG' so beloved of 'pilot shop' providers. Which is a maze of mostly worthless figures in flight.
Navigation training is the worst taught aspect of most PPL schools (apart from how to fly the final approach correctly); is it any wonder that there are so many airspace violations?