1. Your baby is safest in the infant carrier. Keep them in it for as long as you can. They have so much more protection (especially their head and neck) in the event of a crash.
2. Move them when they are either too heavy or too tall. This is either when they reach the upper weight limit (usually 10kg for group 0 and 13kg for group 0+) or until the crown of their head is level with the top of the seat.
3. Ignore the recommended age. Weight and height determine when you should move them. Little T is still in his 0+ infant carrier at 16 months (recommended age range is 0-15 months). He weighs 9kg (he’s pretty diddy!) so will probably be too tall for it before he’s too heavy.
4. It doesn’t matter if their legs are bent. T is very comfortable in his seat even though he’s had to bend his legs when sat in it for months. Think about how you are sat in the car- your legs are probably not straight either.
5. Keep them rear-facing. Consider buying a rear-facing group 1 car seat. Children are 5 times safer in a rear-facing car seat up to 18kg or even 25kg (approximately 4-7 years). I’ll be doing a post about extended rear-facing soon, but if you want more information now take a look at www.rearfacing.co.uk.