From the article Friendly linked to:
"A spokeswoman for the National Society for the Prevention of Cruelty to Children told the Examiner yesterday that the charity was unable to comment on individual cases.
However, she provided the following advice on leaving children in cars.
Always keep you child with you, wherever possible.
If you decide it?s safe to leave your child in the car always keep them within your sight and never leave them for more than a couple of minutes.
Never leave a child in the car if you can possibly avoid doing so.
Always keep the car well ventilated.
Always keep children fastened in their car seats.
Never leave the key in the car or the doors unlocked.
Always park safely and legally.
Never expect young children to look after baby brothers and sisters.
Temperatures inside a car can become extreme more quickly than expected, whether it is very cold weather or very hot weather in the summer."