A big part of the ground syllabus for PPL training is navigation and flight planning. The ground training feeds into practising navigation in-flight and of course eventually to the qualifying cross-country.
What's the best time to start the classroom work on this subject, in the context of training that's spread out over a long period? What are the pros and cons of learning it at different times? If it makes a difference, I'm interested in the situation in the UK for an EASA PPL.