It's not an individual thing. When I worked at a little JS in Sheffield there were about a dozen. Our profile was something like 'Neighbourhood - Student' and the one down the road in leafy Nether Edge was 'Neighbourhood - Aspirational', our store stocked 'basics' beans, pop, cornflakes, cleaning stuff and had the cheap ready meals, over there the lowest tier on most things was the standard 'Sainsburys' one and their ready meals had more of the 'Taste the Difference' range. I think the ones in town were on a profile called something like 'City - on the go'. I've almost definitely got those names wrong but you get my drift.
Those profiles are then further refined to individual stores to reflect their size, as well as to add on ranges like 'world foods' (imports).
Yeah it's very diverse. When I worked in a certain businesses ill fated convenience chain many moons ago, we categorised the stores as such:
Price - Either Price Sensitive, Standard, or Affluent. This dictated which tier of range we had, more Savers in PS, loads of Best and Organic in affluent.
Location - Either Neighborhood (with ranges for bigger shops like bigger packs, bigger household ranges etc), Urban (aimed at smaller baskets and impulse more) and On The Move (tiny non food ranges, masses and masses of sandwiches and drinks etc).
Seasonality - Standard (large seasonal ranges mainly), Tourist (big chilled drinks, impulse ice creams small seasonal) and Student (small baby and grocery range, bigger ready meals pizzas, booze and sold things like electricals and a small home range, small seasonal).
All three of those would allow all sorts of weird combination's of stores. Going from Price Sensitive, Neighborhood, Standard was completely different to an Affluent, Urban, Student.
Reviews of the store price categories did happen, for instance many stores where moved to price sensitive or normal during the 2010's when local areas faced hardships, such as a store I worked in went to Price Sensitive after a local factory closed.
As for the meat question, it's common practice to security tag meat and cheese as it gets nicked and sold around pubs and independent shops. Everyone thinks of booze, electricals and health and beauty products etc but in Urban locations it's cheese, meat, large confectionery, chewing gum, coffee and even medicine's that grow legs and walk out the door. It's not the common misconception that it's hungry people when the economy goes south either. It's almost always related to drugs (which you could argue is an issue itself caused by poverty long term). If it can be sold on, it gets nicked.
