A study by consumer watchdog Which? has found a large number of children are risking injury and even death from poorly fitted car seats.
Which? sent undercover reporters to 43 retailers including John Lewis and Mothercare, and found mistakes were made in fitting 49 per cent of seats.
Which? claim that in 15 of the various retailers visited, staff did not ask the weight of the child, whilst 20 stores offered car seats which were incompatible with the vehicle they were being used in.
Duncan Vernon, road safety manager for England at the Royal Society for the Prevention of Accidents told the Daily Mail: 'Seats that are incorrectly fitted can lead to worse outcomes in an accident.'
Have you experienced problems with car seat fitting?
Do the figures from Which? worry you?
Read our advice on buying and fitting car seats here.