I was told at Bristol to highlight everything you will need! Just do not write notes. Also i think it is ok to have an imprint of lines drawn on the maps, because obviously you have been using it during your study. All of this will help.
I highlighted all the possible routes that were given during the online question bank. Saved so much time!
Some people in the exam had their jepessen checked but not many!
My Advice would be, hit the question bank and mock papers hard and highlight everything you come across onto the maps, exam should be a doddle then and you'll have plenty of time spare!
Good luck!
