@Thismustbemydream
Oh thank fuck for the sensible posters.
I'm another one who had this happen. He was 3, he found the patio key, opened it, and my teen hadn't bolted the side gate... so he escaped. I was upstairs breastfeeding an angry 10 month old who I was desperately trying to feed to sleep. I had to feed upstairs or he wouldn't feed, and certainly wouldn't nap with my 3 year old in the vicinity.
Half an hour later I emerged to find said 3 year old gone. As I ran around the house frantically searching, the house phone rang. I picked it up - it was the hospital. Police had picked him up, and taken him to A&E. Luckily (or unluckily!) One of the staff on duty recognised him as he had been in 2 weeks earlier having broken his leg at soft play. So that's how they knew to ring me.
I also had social services at my door 2 hours later. They were satisfied it was an accident, and that I had taken steps (ordered door sounders and chains, blocked off back gate access, remove keys from child sight) to stop it happening again
I'm also a HCP. It can happen to anyone. Put your judgypants back down.
Errr no it DOESN'T happen to anyone and everyone. It happened to YOU and that's why you're so defensive!
And because you're a HCP - your opinions are views are more valid and 'correct' than others are they? 
'Sensible' is looking after your INFANT child and taking care of them and their welfare. Not noticing they are gone and having to have the POLICE bring them back, is slack and careless parenting at best. Neglect at worst.
How long would it have been before the woman noticed the child missing? An additional hour? An additional 3 hours? The child could have been 200 miles away by then!
Unbelievable. I have no idea where you did your training for whatever your 'HCP job' is, but you need to book yourself onto a LOT more health and safety and child safety courses!!!
And as a few posters have said, damn RIGHT I am fucking judgemental. What happened is appalling!