Such hysterical claims are not helpful at a time when scare stories are spreading about wireless networks in schools.
Yes, a Danish study found that the number of five-year-olds being diagnosed with a hyperkinetic disorder, similar to ADHD, almost tripled between 1992 and 1999. The problem for Mr Philips is that wi-fi did not start being widely used in British schools until after 2002.
More research is needed. But until it is completed, teachers should remember that the dose of radiation a person receives from exposure to a wi-fi system in a year is the same as just 20 minutes' mobile phone use.