This idea came from my friend Irene who swears by this unlikely-sounding regime which has one simple rule – you can eat as much as you like of absolutely anything as long as it is plain yoghurt or banana. You are supposed to do it for three days. Since banana is a diuretic and yoghurt an evacuant (let’s not go there) it does work, but I don’t suggest you do it for that long. By dawn of the second day you will be out of your head with the tedium of it and hallucinating about toast and marmite or anything that isn’t bloody yogurt or banana.
It does, however work, as a quick fix to get into a tight dress. (On the other hand, you could just wear a bigger one.) (Or a decorated tent.)