I agree with Loser85 on this one. I know from my own experience that when it's only a week or 2 till a holiday or event and you want to lose more than you physically can in the time left... Then it's just very hard to be properly focused.
As said, why don't you give yourself a break and start again after you hols? That way you find ome back with nothing in the pipeline to get in the way and have to break your diet again for.
The reason I like VLCD's so much is because there's a hard & fast rule to stick to. No decisions about food, what to have, what to avoid... It's not even a factor. Exante (which I am also currently doing myself to lose some recent holiday weight) is a complete food replacement plan. So, no food. At all. No cheese, or little pieces of ham, as hard as that it...
But it's even harder if you have little bits as it blurs the lines of what's allowed. And leads to eventual big cheats, in my experience.
No food, just packs. It works, the hunger is bearable, and the weight shifts. It's all about having 100% commitment and being in the zone... You can do it hun, so give yourself a break.
Xx