I never did the whole day meeting, Im not sure they do that now.
My journey took about 8 months, from the initial contact to the actual operation.
First Meeting : Meet the nurse, and they just go through the procedures available.
Second Meeting: (Approx 3 Months) You get put on the milk diet, mine was 4 pints of semi skimmed milk, 1 sugar free jelly and one oxo cube and one multi vitamin tablet a day.
Third Meeting: Refeed Diet, 2 x 200 cal snacks, 2 pints of semi skimmed milk and 1 x 400 cal meal a day.
Forth Meeting: Meet the surgeon, and you get your date for surgery.
I think thats right, but the whole process takes about 8 months.