Girlfriend and I. We have an online order of all the staples of rice, cereal, tins, toiletries, household cleaning products etc. every other month, which normally costs around £90. We then do smaller shops every few days, mostly for fresh/perishable items, average something up to £30 a week I would say. So that averages out at £40 a week, £160 a month or so.
We do like to cook together so rarely have ready meals at home. We don’t drink much alcohol at all, do eat meat & fish but generally only small portions (no large joints/steaks etc.) and probably only on around half of days. Don’t buy many ready meals at all and not much prepared vegetables. We’re generally happy with the staples to be supermarket brand and try to buy in bulk/take advantage of offers. I don’t think we’ve had a takeaway at home in the last two years. We’re perfectly happy with our diet, plenty of fresh fruit and vegetables. I am normally travelling for work a couple of days a week which does reduce costs a bit. We do some shopping at Lidl for specific items, otherwise Sainsburys/Tesco for most stuff. We do go to the pub for a drink or two every week or two and I’m not including that cost here.
Two major factors in cost are meat and alcohol. Another couple might have a large joint once or twice a week plus a glass of wine with dinner most days, that could easily be £20 a week. Though it's obvious if that's the case. Number of takeaways is again obvious. But, within the scope of cooking all meals at home, perhaps the largest factor is how you choose your ingredients. You can make a rice dish at home using supermarket-brand rice bought in bulk for say 20p a person. Or you could make the same meal picking up a single serving rice/spice packet mix on your way home and pay £1.20 or something a person. So there can easily be factor of 5 differences in cost for effectively the very same thing (without going into whether branded rice is worth 50% or 100% higher price than supermarket brand).
So we’re at about £160 a month for a couple, we feel we eat well, we don’t feel like we’re doing anything special or making particular sacrifices to achieve it.