Parents, do your children use a lap belt in the car?

i am looking to buy a new car people carrier but have just noticed that most of them have lap belts in the middle seat, so the only option i have is to put the eldest who is only 3 3/4 in the middle seat with her high back booster and the lap belt, but it really doesn't seem safe at all, does anybody else use a... show more i am looking to buy a new car people carrier but have just noticed that most of them have lap belts in the middle seat, so the only option i have is to put the eldest who is only 3 3/4 in the middle seat with her high back booster and the lap belt, but it really doesn't seem safe at all, does anybody else use a lap belt or does anybody know of anything i could buy to make it safer for her to travel in the car.

thanks
Update: Mel - how much did it cost to have one fitted is that a few hundred pounds or dollars?
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