With the baby carrier make sure you fasten your belt around YOU but NOT THE BABY. If the baby is between you and the belt in a collision you will crush it to death. Fasten your belt, then slip the bubs in the carrier on.

From a safety POV if you HAVE to travel in a vehicle where there aren't enough belts then you belt the heaviest person first. The lightest person (the baby) should be the one to travel loose. I know this goes against mummy-instinct but in a crash situation you are more likely to be able to hang onto a baby, but if it is fastened in and your 70kg body hits it in the seat at the speed of the impact you will kill it. Unrestrained passengers kill many more people in collisions than the interior of the car does.

Bx