Mobile phones have not been found to be associated with any biological or adverse health effects according to the UK’s largest investigation into the possible health risks from mobile telephone technology. The Mobile Telecommunications and Health Research (MTHR) Programme has published their conclusions as part of its 2007 Report. The six year research programme has found no association between short term mobile phone use and brain cancer. Studies on volunteers also showed no evidence that brain function was affected by mobile phone signals or the signals used by the emergency services (TETRA). The MTHR programme management committee believes there is no need to support further work in this area. The research programme also included the largest and most robust studies of electrical hypersensitivity undertaken anywhere in the world. These studies have found no evidence that the unpleasant symptoms experienced by sufferers are the result of exposure to signals from mobile phones or base stations.