I just passed mine last Tuesday, double click one second apart on hazards. Try and get them on the approach to the hazard, they’re blatant in the theory centre all CGI and the mock ones seem to be a lot harder, I didn’t even bother with them. Of course the longer you sit revising thinking you’ll fail, the more months money they get out of you.
Just read your DVSA Guide to Driving Goods Vehicles and you’ll be mint on the theory and CPC. You really want to memorize driver hours and how they can be reduced, also the fact you can interrupt daily rest twice for no more than a hour to get on & off a ferry. Also it goes from a 24 hour to a 30 hour period if you’re double manning.
The mock tests won’t cover everything the DVSA book will. 