I've had to limp through January with a grocery budget of £30 a week, to cover everything - food, toiletries, cleaning stuff. This is for 2 adults and 2 teenage girls. Caveat - I know that is far from enough, and our situation is temporary - only another 2 weeks 
. We started off with a full freezer and cupboards, so with a lot of planning and shopping for reductions I've managed it.
My problem is that now we're getting to the back of the cupboards, there is nothing left for my dh and teenagers to snack on. I've managed to feed us proper meals and can manage without snacking myself, but the girls are growing and dh is a big guy (tall, not overweight). There's always someone with their head in the cupboard wanting cereal, buttering bread, eating crackers and bits of cheese, fruit, all the things that I'd earmarked for breakfasts and lunches. With only a fortnight to go, I wondered if anyone had ideas for things I could put in the next weekly shop that would cover between-meals snacking? It has to be mega-cheap because our budget is rigid and anything I pay out for the bloody snacks has to be taken away from something else. I've just found out they've eaten the loaf I had in the freezer for next week's packed lunches. All ideas appreciated (but no Aldi suggestions - I know that's the budget favourite but there isn't one anywhere near where we live!).