I spend £100 a week, two of us plus a cat, that is everything, wine, cat food, cleaning and beauty, coffee beans @£15 a month. I drink a bottle of wine most weeks at £7-8 ish.
I don't scrimp, buy whatever I want generally so I could cut back but I cut back by shopping in Aldi, I buy a lot of the black box stuff so a fish pie @ £5 ish or the Lobster Crayfish bake @£7 a throw.
I love fish and shellfish, Aldi do raw king prawns (in the freezer) for £2.20 ish a bag - a bag feeds two, something like chilli prawn pasta.
I don't buy their chicken though after having a couple of chickens that I thought were about to go off, I go to M&S or Booths for 3 for £10 for that.
Meal prep - this weekend I cooked a chilli in bulk - 2 packs of braising steak (on the 3 for £10 deal), packet of dried black beans, tomatoes that needed using up plus a box of pasatta, onions, garlic, chilli, peppers that needed using up, stock cubes, thyme because I didn't have oregano. That is enough food for nine portions which is probably £1 a go.
You'll be amazed at how much you don't spend not feeding another adult. If you go to Aldi you will reduce your bill by at least ⅓.
I would never spend the £5 or £6 that king prawns cost in the supermarket every week.
I don't buy their pasta though, I prefer to buy a better quality dried pasta than they sell and at £2 for a pack that feeds four I don't mind the cost of that.