I vary - some weeks I have a lot to get, some weeks I stock up on wine, other weeks it's just meat/fruit&veg/milk/bread so very little.
I work on the basis of trying to get good value, using up what I buy rather than throwing out food, buying decent quality. I try to grow as much of our veg as possible (small back garden). But also knowing that DH and I work stupid hours, DD is fussy (and as she is ASD and also underweight, I pander to that more than I would like to so that she will definitely eat especially at school). And that there is a need for quick dinners some nights, making sure I have what everyone will eat, and being able to juggle other things so internet shopping some weeks (which usually means making sure there's enough in the trolley to get it delivered and not shopping around that week to F&V shop, butcher or Lidl etc).
I cook from scratch as much as possible but also keep a good few jars of decent sauces to be able to do quick dinners. And I've learned a few other ways to do fast dinners (fresh pasta with carbonara or creamy sauces, lots of oven-cooked dinners using the timer, or oven chips and fried eggs etc). I try to keep takeaways to a max of 1/week (we don't have them every week).
I use points in Boots to get some sanitary items.
I use the loyalty schemes of the supermarkets I frequent.
I do go to the local butcher, F&V shop, fishmonger, baker etc the weeks that I have a chance.
And I freeze leftovers (whether I've done a double batch of a dinner for another night as well or just bits and pieces I can use another way another night), or make things like Spanish omlettes, stir fries etc to use up small bits and pieces.
But we can afford to spend what we do, and we have gone up a bracket on our wine consumption and do have some luxuries in that budget. I still don't think that our family of 3 goes anywhere near £200 a week though.
We spent €199 in Sainsburies when on holidays, as food for the week and some bits to bring home - which included things like bottle of gin, a few beers and a box of wine. But that was a massive shopping spree really. I budget for €700 a month, in general, and including my grocery shopping in M&S near my office (for milk and fruit and some lunches, and some easy dinners or cured meats selections for Sunday dinner), I generally come in or around that amount.
I am not as good at the "rubber chicken" as I used to be (don't have time to make stock really anymore), but I do occasionally still do 1. Last night I spatchcocked a large chicken for dinner with salad, there's another night of leftovers in the fridge for salad or a stirfry and DD will use some for breakfast at least 1 morning (she loves cold meat and cheese for breakfast).
I'd love to do better, but I know I could be a lot worse at the same time.