The Professional Association of Teachers (PAT) has written to the education secretary, Alan Johnson,  to seek an immediate investigation into the possible health effects of Wi-Fi networks on students.

According to the PAT, networks within schools are one of the reasons that pupils are behaving badly and suffering from bad health, not social deprivation and bad diets as commonly thought. Other side effects which have been mentioned are cancer and premature senility

Around 80 percent of secondary and 50 percent of primary schools have Wi-Fi networks installed within their premises, but as nearly all children are subjected to stronger electromagnetic fields in the form of mobile phones, measuring the effect of lower radiation wireless networks could prove difficult.

And what about the dangers of Bluetooth.....