To explain it more simply.
If you want to do SS whether it be 3 or 4 packs under new guidance the CDC has to write to your GP to advise them you are doing a very low calorie diet. This is not asking permission this is just for their information.
If the client does not want the CDC to contact the GP then the minimum we can supply you with is the 615 cal programme.
That is:
3 packs and 200 calorie meal or
4 packs and 200ml skimmed milk
By having 3 packs and 200ml skimmed milk you still fall below 600 so GP notification will be required. This is not one of the set CD programmes.