If you are doing this correctly, you shouldn't "need" the coffee and biscuits in the afternoon.
Your very large breakfast of high protein and sat/MCT fats should carry you through till late lunch, which for me has become a small snack (a thick sausage patty). Which carries me well into dinner, which is maybe salmon and broccoli, or a small steak with veggies.
If you do feel super hungry, and you have not eaten lunch, then go ahead and have something with protein and fat: tuna with celery, etc. No more biscuits!