I seem (touch wood) to have broken my plateau now. As verilyvexed says, I was given the advice to eat more, because my diet consultant is positive that you can sabotage your diet by eating too little. The goal is to eat enough to keep your body out of "emergency stop yourself starving to death" mode. (Because it's not really a matter of simple physics - your body will compensate for the physics in an attempt to survive.)

So I went out last week and had a meal at a restaurant, along with what must have been an incredibly fattening dessert. As it was at a restaurant, it was easy to go back to the diet as normal when I was at home - a special meal out gives you your spike without risk that you'll go back to overeating at home. Then I got weighed yesterday and found that I'd lost 2.5lb in the week.

I hope I've convinced my body that the good times are here again and it doesn't need to hoard that fat for self preservation. But I guess I'll have to wait to see if I carry on going down from here. It may be too early to celebrate yet.