Tesco and Sainsbury's shoppers could be hit with a penalty charge notice while "just nipping in" to one of their stores, if they park incorrectly.
Sainsbury's says it "regularly monitors" its car parks, and this includes keeping an eye out for people who are parking in parent and child bays without actually having kids with them.
Any parent will know how difficult it is to manoeuvre yourself and at least one child into and out of a car, often with a trolley nearby, in a regular-sized parking space.