100,000 children are involved in crashes every year, say the AA

The car seat testing session, at Tesco Extra in Fforestfach, comes after a similar recent one which found just seven out of 51 baby seats were correctly fitted.

Trading standards officials at Swansea Council said they will follow up the problem which has been described as 'shocking'.

Giving information at health clinics and helping retailers with advice will now be carried out by the trading standards team.

We are aware that a large majority of seats are either unsuitable for the user or are incorrectly fitted Councillor David Jones

"We want parents to think of car seats as essential, we still see children on a parent's knee which is horrendous," said David Picken, trading standards manager.

He said he was not surprised at last Thursday's results because, although it is shocking, many other local authorities report similar findings.

"The exercise has been well received through the local media, we need to raise the public's awareness because people still need to be reminded."

The team at Forestffach tested 94 seats and 68 were faulty or wrongly fitted.

Councillor David Jones said: "We are aware that a large majority of seats are either unsuitable for the user or are incorrectly fitted.

"We find that parents are usually quite shocked when they discover that the seat is faulty or incorrectly fitted.

"But it really is important that families make sure that child seats are fitted properly. They are proven to save lives in the event of an accident."

Mr Picken said their project could prevent injury and ultimately save lives.

Problems with buckles not being in the right place, twisted straps or loose car seats can lead to injury, said Mr Picken.

Car seats have to be compatible with a car-make and a child can sometimes be too heavy or big for a seat.