Well i do have a slight advantage I guess julie. I work at the Co op and get a massive (!) 10% discount and I also have first dibs on the whoopsied stuff. Think I can say, hand on heart, that pretty much everything in my fridge, freezer and cupboards have an orange label on them, rofl.
I get my toiletries and cleaning stuff which normally only comprises of bleach and spray anti bacterial cleaner from my local Poundshop.
I get free eggs weekly.
Milk and bread I buy from my local asian shop, which is miles cheaper than from a supermarket. I also bulk buy flour and cooking oil from them too, again, works out cheaper.
I've also learnt the art of stretching what i cook too. A chicken (again, usually whoopsied) makes on average 3/4 meals for the 3 of us, and even the carcass gets used as a soup stock.