No no no no no!
I am currently on a liquid diet (the milk diet for 2 weeks pre surgery) and I cannot see how it is beneficial, its tortur every minute of the day.
Yes the weight falls off v fast but what about when you stop, and you have to stop because liquid diets are just so unhealthy, no only for what you are ingesting but that the organs and gut and bowel dont get to do their job etc.
When you start eating again, the same bad habbits will be there that are there now, you will NOT have re educated yourself.
If you are serious about losing weight (and I also have about 9 stone to lose to be in the ideal weigh range) spend the money you would have spend on cambridge/ll and get some Cognative behavioural therapy from someone qualified in eating disorders/weight loss.
By doing that first then you will able to make ythe changes you need to lose weight, keep it off and be happy while doing it.
Ive been on liquids only for 10 days so far and I fail to see why anyone would do it or have gastric surgery that would make them only be able to have small/liquid diets.
THere are other ways but they do take time, the quick fixes rarley work out in the long term.
Its only now after 15 years dieting (and im only 30) that I realise that Ive abused my body enough, it doesnt deserve to be crash dieted, I need to start treating it with respect and feeding it what it needs, good nutritious food, regular gental excercize and the occasional treat to keep my head happy.
But Now im off for another pint of milk, which is a solid as my food gets until Friday.
Good Luck!!!