I'm not sure - you could google it. All VLCDs work in a similar way though and there are lots on here that you could take a look at. I have type 2 diabetes and was on 4 metformin plus another tablet before starting my VLCD. Within 2.5 weeks I was off all diabetes medication - it was shocking! I have now lost over 7.5 stone and am still going strong. There are a few different types of VLCD:
With Group Therapy and weigh in - eg Lighter Life (most expensive because of therapy - 4 packs and no milk or veg £72 per week - lite version with 3 packs and a daily meal £54 per week)
With Counsellor for Weigh In - eg Cambridge (3 packs per day - don't know much about this but I think it's somewhere around £55 per week and may have some version with a meal)
With pharmacy for weigh in - Lipotrim - don't know much about this
From Internet So Self Weigh - eg Slim and Save (4 packs per day (around £120 for 4 weeks), or 3 packs and a meal, or 5 packs for men - allowed some veggies and milk) or Exante (don't know much about that one either)
There are others too. You could pop into the specific diet forums and ask questions in there if you might be interested in one of those. Important thinks to understand is the range of food packs, what people think of the food packs and the service they get. You will lose a similar amount of weight no matter which VLCD you do as they all work in the same way.