Child booster seats without integrated seat backs are dangerous and should be phased out, according to consumer group Which?. The group says that through the use of such seats, or no seat at all, 47% of children aged 4-12 are at risk of “serious injury” during side impacts – accidents which it says account for around a quarter of all collisions. By law, children who are under the age of 12 or under 135cm tall must use a booster seat – though a study highlighted last year by Which? found that only 42% of parents correctly understood this. It adds that in a survey it conducted last month of 1,000 parents of children in this age group, 30%, of respondents said that they use a backless booster cushion, while 17% admitted using no child car seat at all. But while backless cushions meet legal requirements, Which? says, parents should be “very wary” of using such seats, due to what it claims is the minimal level of protection they offer. More