Also bear in mind if you have passanger side airbags fitted as they are designed for adults so may cause injury, if deployed, to a child. Check your handbook and if nessecary turn them off.
well i thought it was against the law for children to sit in the front even with booster seats,but sinde working as alollipop lady and seeing children in the front i questioned it and was told they can sit in the front with correct seats .When im on short journeys i tend to let my 6 yr old with a booster cushion sit in the front as i feel i can talk to her and hear what she is saying better.