OK. All sorts of opinions - most of which have some truth and value.
But I’ll tell you the most effective way. Take your Mod 4 BEFORE you do your CE (Class One). Check with your trainer to see if they have CE training approved for driver cpc - some do, some dont. Assuming they do, you will get probably 14 hours of periodic training from your CE training.
So, to be clear, passing the Mod 4 will give you entitlement for 5 years - approx Dec 2024. The 14 hours gained by completing CE training (regardless of the test result) will credit automatically towards the period Dec 2024 - Dec 2029. This will definitely save time and almost certainly save money as well.
But you must check that your trainer is able to offer the cpc. Then make sure that you have arranged it BEFORE the course. It cant legally be backdated so it’s no good going back to the trainer once you’ve completed the course and asking for it to be credited.
Hope this helps, Pete 