There has been very little work regarding the effects of the radiofrequency signals from mobile phone base stations on the electrical activity of the brain as these exposures are very small; usually many thousands of times below human exposure guideline values. Research in this area has therefore focused on the effects of exposure from the fields associated with mobile phone handsets. Exposure measurements around base stations are available on the websites of the Health Protection Agency at www.hpa.org.uk/radiation and Ofcom at www.ofcom.org.uk
The research on health effects from radiofrequency electromagnetic fields was comprehensively reviewed by the independent advisory group on non-ionising radiation in 2003. The review concluded that:
"Exposure levels from living near to mobile phone base stations are extremely low and the overall evidence indicates that they are unlikely to pose a risk to health."
Nevertheless, in view of the recommended precautionary approach to the use of these technologies, the mobile telecommunications and health research programme in the United Kingdom, funded jointly by the Government and the mobile phone industry, is supporting a study examining if signals from handsets may affect brain wave activity in volunteers under rigorous experimental conditions. The results of the study are expected to be published in due course.