The largest group of booster seats fell into the Check Fit category.

FORBES: Booster Seats Are Better Than Ever, a New Report Finds

Booster seats are for children who have outgrown forward-facing child restraints.

FORBES: Booster Seats Are Better Than Ever, a New Report Finds

Tesco said sales of its booster seats - which are suitable for bigger children - were up 1, 000% this week, compared to the same time last year.

BBC: Three children in car seats

But there have been concerns that parents have not been properly informed about the new laws, and many will have got rid of their child booster seats years ago.

BBC: Three children in car seats

Booster seats have improved in recent years.

FORBES: Booster Seats Are Better Than Ever, a New Report Finds