This might be a bit controversial but I really don't think slimming world, weight watchers or milkshake based diets are that great.
I think regular weigh ins are a baaad idea. Sometimes it takes a while to see results and when you don't see them on the scales, it can make you feel rubbish and more likely to stop trying or give in to that takeaway.
I was obese and have lost 5 stone but this was done over a few years. Some came of gradually, some came off quickly but I have gone from 13 stone + to 8 stone 6. More importantly I have maintained this.
In the early stages of starting to lose weight, I tried all those diets under the sun but I didn't actually start losing until I was eating.
Eating normal amounts - just healthy food!
Healthy meals - breakfast, lunch and dinner. No snacking. Stepping up exercise to help. I do however believe 90% of it comes down to diet - it does for me anyway!
For me the best way of losing weight was changing my lifestyle and eating. It never felt like a diet. I got on with life and saw the results later down the line.
It is different for everyone though and I'm not denying slimming world and weight watchers hasn't worked for people because it obviously has.
I have a friend who is currently doing the Cambridge Diet and she is doing ok but I just feel that these diets are a quick fix and that once you come off them, you are unlikely to maintain what you have lost.
It's your eating patterns and habits that have to change and unfortunately no quick fix can help that.
That is what I have learnt anyway :-)
However if its for your holiday then I think doing the cambridge diet should definitely work if you follow it through. It's just cutting down you calorie intake so you will definitely see results!