A "corner shop" refers to a small store located on a street corner, usually in a residential area, that sells everyday items like groceries, snacks, and household goods. Full definition
For example, pupils can spend their change in the local corner shop on unhealthy snacks, instead of on a healthy meal at school. (educationbusinessuk.net)
The shop was a little corner shop with a bakery and a small store front. (glutenfreepalate.com)
The right for MPs to run corner shops is obviously a matter of great personal concern to the prime minister. (politics.co.uk)