Conversation so far:
why does the DVSA charge a fee for ADI registration
The ADI registration fee covers a number of elements: estimated Costs of registration team $149, examiners $146, Product quality and development costs $32, Administration and Overheads $28, Total costs $355

Question: How many tests are needed to be approved as an instructor
Self-contained rewrite: How many tests are needed to be approved as an ADI driver instructor