Not only that, but one of these car seats was recently spotted at a car seat checking and fitting event. They were alerted by a member of Warwickshire police that one of these seats had been spotted during a car seat fitting and checking event. Best baby or child car seats: make sure you use a car seat that has been through our rigorous tests and you can rely onThe law on child car seatsThe law on child car seats states that only EU-approved seats can be used in the UK. Buy your car seat from a retailer that can provide advice and help you fit the car seat correctly into your car. For more tips on buying a child car seat that's safe and durable, read our guide on how to buy the right child car seat.