Family of 2 adults and 2 teens.
I spend approx £60 on a weekly Sainsbury's C&C.
I then do a top up shop at Morrisons where I spend approx £15, but I time this so that I go at reductions time, and tend to pick up lots of yellow stickered bargains to fill the freezer. (My Morrisons seem to reduce down to approx 5%, so I've had fillet steaks for 20p/topside joints for 60p/trays of chicken thighs for 10p etc)
I then also (when I have freezer space) do a top up meat shop from the butcher which is approx £50 every 2/3 months.
So probably about £80 a week in total. This includes everything including toiletries, household products, wine etc. Doesn't include the teenagers school lunches.
When the teens were home during lockdown, extra food plus lack of availability of some products (plus no yellow stickers) sent the weekly shop flying up to £130ish, but it's all gone back to normal now.
We're not fussy eaters and no food allergies, plus I'm a good cook and always meal plan. We're also mainly happy with own brands, and seasonal veg, all of which keeps the bill down. We eat quite well for the money I spend, and could definitely cut it down if I needed to.