Parking outside the supermarket there was a toddler asleep in the car next to us, no windows open (my car was very hot when I got in it earlier) and no one around. I took my time sorting DD out, took a good 5 minutes and no one appeared, so not a panicky rush in and out job.
I waited a bit longer, faffed with the trolley, still no one. So I told the staff at customer services who got the reg number and put a call out. I was concerned that a) the child would be over heating and b) if it awoke alone in the car he could panic and get in a right state.
The customer service woman called me over as I left and said no one answered the call but they checked 2 minutes later and the car was gone, and coincidentally a half full trolley had been abandoned in the shop
You could tell she wasnt impressed if someone doing a full weekly shop had left their child in the car alone.
Told my mum and she said that I didnt know why the child had been left, that her and dad used to do it all the time (I know, thats one of the reasons I reported it, I remember the fear!) and I should mind my own business.
So, did I do the right thing or not? I feel that I did but she was adamant I should have "kept your nose out".