Our weekly shop had gone from £70 per week to around £250.
We never used to eat at home (out of the house early, back home late), so it was only really food for the weekend, plus toiletries and cleaning materials.
Now we are shopping for 3 meals a day for our household (me, DH, DS3 and DD2), plus my parents, who are isolating at their house.
I am meal planning so we don't waste anything at all, whereas pre-covid we threw away so much food, I used to want to cry. We're buying more snacks and fun treats, plus fruit from the grocers and meat from the butcher so it's really adding up.
Having said that, we're not eating lunch out, not paying for travel cards or petrol, and not paying for the children's nursery (they were both in 4 days a week), so overall we're saving quite a bit.