My wife and I do online shops at Waitrose (which is probably the most expensive supermarket) and at a local butchers and don’t particularly try and save money on food. We spend about £100 a week on average including the delivery cost.
Where I’ve noticed increases this year it’s been on milk, butter and some basic vegetables like potatoes. But at the same time - there’s been articles about how dairy farmers were under such competitive pressure in the UK that they’re closing and going out of business in the last couple of years, so to some extent, price rises in that area were inevitable.