My baby is 8 months old and weighs around 10kg. Gov website says if you use an I size car seat you go by height and baby needs to be rear facing until 15 months. Or you can co by weight in which case my baby falls into group 1, between 9-18kg and can be either rear or front facing.
I am confused as to why if it’s height they need to be rear facing until 15 months but weight wise they don’t. My baby is growing out of his group 0 car seat so please help!