There are four modules to qualify as a new HGV driver. Modules 2 and module 4 are what are known as the initial driver CPC qualification. You will need to pass both modules to complete your initial CPC. On completion you will receive you Driver Qualifications Card (DQC) which allows you to drive commercially.
Initial CPC includes:
On completion of both modules you will be issued with your initial DQC which is valid for 5 years. Within that 5 years and every 5 years thereafter you will then become subject to periodic Driver CPC training, i.e. 35 hours of training every 5 years.