Child Booster Seat Law I Have A Queston About Uk Laws On Child Booster Seats............?

I have a queston about uk laws on child booster seats............? - child booster seat law

I have a six year old son, who regularly in the back seat of a booster seat. He continues to want to stay in the front seat. If you use the car seat is legally permissible to do so. The car has no front airbag on the passenger side, if it helps.