Hmmm, my food bills have shot through the roof !
Just compare snacks:

1 packet of biscuits: £0.40 (hey I like the stores ownbrand "nice-biscuits"

1 packet of cheese: £1.69

I also buy more veggies now, as I don't have cheap fillers like rice and potatoes anymore.

I also eat more vitamins now (the price for Q10 is insane !)

I eat more real meat - no more sausages and cheap burgers ( both contain high amounts of bread) and no more vegetarian dinners

No more fish-fingers, real fish instead

Less coffee - saves me about £2.00 a month
Less diest sodas - saves me about £1.00 a month
More Water - Not sure, water bill hasn't gone up much and I refill at work a lot
Cream instead of milk - costs me about £5.00 extra a month (milk is a lot cheaper, and I still need to buy it for BF and daughter)
basically, protein food is a lot more expensive to buy, than crisps (potato chips for you ) and biscuits.
The lunch situation is about the same as before. I either have a BLT with no bread (they charge the same for that) or bring my own (did that before as well), or have some convienient processed food ( hot-dog-sausages, Cheese, ready made chicken...)

I recon my food bill has gone up about £25-30 a month, propably more