We spend about £80, but there are four of us including a bottomless teenager. I think it should be possible for 2 adults and a small child (not sure about pull-ups)
I get a fortnightly veg box, around £15 from Riverford
I buy organic meats from High Hacknell. It is undoubtedly expensive, but a freezer full lasts ages, I only buy about twice a year.
I haven't been able to find anywhere locally that makes this possible on a budget.
My basic feeding the family plan is a joint on a Sunday which will then make 2 further meals with the addition of lots of veg. e.g this week was beef, followed by stirfry and spag bol. Next week will be chicken, followed by chicken biryani and chicken noodle soup (with sweetcorn and greens)
For other meals we will have tinned or frozen fish (not organic), eggs or vegetarian with probably only one other meaty meal (sausages or mince from the meat box)
Lentils are your friend, you can make mince or left overs go twice as far, no-one notices they're there and you can buy for pennies (I admit mine aren't organic)
We have a lot of porridge and I bake a lot.
I never buy, breakfast cereals, cakes, crisps, anything individually wrapped. I do buy cheap biscuits but never anything fancy. (no-one goes without, but they'll be homemade)
For cleaning products I use only washing up liquid, vinegar, economy bleach for the toilet
and Lidl washing liquid for clothes.
Toiletries all come from Lidl, so not organic, but you have to make some choices. Lovely "Pantene" shampoo 75p and perfectly good shower gel c.38p. I always got nappies from Lidl too and found them excellent, but no recent experience.
I find that actually buying "food" i.e. things that make a meal is a small proportion of most people's weekly shopping bill. It's the extras that we don't really need and which aren't good for us anyway that make it all add up.