Yesterday where I live a 12 month old child fell headfirst from a trolley hitting the hard floor, She is in stable condition but has head injuries.  when you look around you regularly see really little children unrestrained in trolleys, prams and worse of all in cars.

I guess

Some of the horror stories you here, where children have been in the front seat (I think the rule is they must be 12 years old bt don;t quote me) and have no belt cause "we were just going round the corner". Trolley seat seems snug so should be fine. We all have probably done it at some point myself included and unless we are personally touched by a tragedy it does not always seem a big deal.

The facts are we cannot watch them every second, sometimes we cannot catch them. My son was 3 when I popped him in his carseat and bent down to put his bag on the floor before putting his belt on this choice resulted in disaster. In 3 seconds he jumped in the front and knocked the car out of park. Sending the car backwards down a hilly driveway, crushing me between car and brick retaining wall. Had I put his belt on first........

Someone once said to me its all the little things that count and I really think this is true. Take every precaution cause sometimes theres no second chance to get it right.