The way your response was edited did read to me as sarcastic, and I apologise if my response upset you that was not my intention.
I don't know if you have read my diary but I am qualified in health, fitness and nutrition (yes I know how did I get fat then lol) I gave all of it up to take a desk job and get ready for a family.
I don't know how long you have been doing Cambridge? But on the MRF you filled out before you started it asked if you have any eating disorders, if you have you are contraindicated and would not be allowed to start the diet in the first place (sorry). Aqua ban is a big no on Cambridge, lots of people think the more you drink the more you lose it won't work like that. Drink only your 2.25lt and your shakes and your body will be pulled back in to line. Your CDC should have explained that adding a meal week anywhere upto a maximum of 12 weeks on SS, you should have also been told to start the add a meal week at your second low loss week (Cambridge did recommend at one time to do this even 4th week regardless)
Diet drink/zero are still an unknown with CHQ and they are still looking in to the effect on them on the diet (personally I would not like to be the guinnepig and want the weight of as fast as possible) so until they can say to me yes you can have them, I won't drink them. At the moment the ruling is only one 500ml bottle. Same with chewing sugar free gum this is also not allowed.
As I said before weight loss has a science but it is not exact as everyone body is different. So with saying I don't want to add food, what you are doing at the moment is not working so why not alter it, you don't have anything to lose other then weight.
If you don't like this response I am sorry, but I don't think me posting saying "1lb is great stick with it or your fine keep going" will help you in the long run. X