Parents are ignoring health warnings by allowing young children to use mobile phones, according to a leading expert. In his latest report, Sir William Stewart, head of the National Radiological Protection Board, says there is still no proof that mobiles are harmful, but nonetheless he recommends a precautionary approach because of the difficulties of assessing the impact of such a rapidly evolving technology. He points out that childrens' skulls are not fully thickened and their nervous systems not properly developed - any radiation from a phone will penetrate further into their brains. Sir William also calls for a review of the planning process for base stations and argues that mobile phone masts should not be sited near schools, saying he is now more concerned about possible health hazards than he was five years ago. According to the latest figures, one in four children between the ages of seven and ten, now owns a mobile phone. 

Parents can help reduce the risks by chosing phones with a low emission rate or SAR - go to the Mobile Manufacturers Forum website for information on individual phones.

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