Well not actually locked but leaving child in the car.
I got called from work to collect DS from school at lunchtime - he was crying, temperature, earache. So I managed to get him a cancellation appt at the doctor and it turns out he has tonsilitis. DH is in Germany.
So when it got to time to collect DD from nursery I had to take DS with me in the car. DS pretty miserable - so should I have left him sat in the car listening to Coldplay or should I have taken him with me into a roomful of one year olds to spread his germs?