The car safety seat is probably the most important purchase you'll make for your child. Alhough the new car seat legislation has been created to help keep children safe it has made it quite complicated to know if you are legal or not. So we've tried to make it as simple as possible for you. The law states that children must use the correct chid seat to suit their age/size until they are 12 years old or 135cm tall, after that they can use the adult seat belt. The only other law you need to consider is that it is illegal to carry a baby in a rear facing safety seat in the front seat of a car with an active air bag.
There are various types of safety seat that suit different age groups and weights. All you have to do is pick the right type of seat to fit your needs. We've broken all the seats into sub categories that shows their approximate age range. Hope this helps to make things clear for you.
If you want further details on child seat law please go to :
http://www.childcarseats.org.uk/law/index.htm