Urgh, it is frustrating isn't it? :hug99:
But sometimes that's how the diet goes. Were you on another diet before you came on to Cambridge? If you were, then the chances are you'd already depleted you glycogen and water stocks, so you wouldn't get the big whoosh in the first week that other folks get.
Other things that make a difference - are you exercising a lot? If you are (and I know this is going to sound odd!) ease off a bit, because exercise on SS seems to slow down losses.
Are you hypothyroid - have you had trouble losing weight on other diets too? Might be worth getting that checked out - have a google of the symptoms and see if they fit.
Water intake is the other biggie - are you managing to drink at least 4 pints a day? If not, try and get the amount up a bit.
Are you constipated? If it's been a while (or hasn't been much), consider taking a laxative to get things moving. Senna usually works well.
If it's none of these things, then still hang in there. Some folks do start out slow on this diet, losing 4 pounds the first week, then only 2 the next - and then have a week where 7 pounds fly off. You might be that person. It will work but goodness knows, I know it's hard to be patient when you're feeling so deprived!
Just remember that this diet will work faster than any other diet, even if you're off to a slow-ish start.
And finally, well done on the 2.4kg off so far. :clap: