However, those startled by the program will be interested to hear the official BBC complaints ruling, which found that Panorama created a "misleading impression of the state of scientific opinion".

The investigation was carried out after two viewers complained that Panorama exaggerated the need for concern, claimed Wi-Fi installations give off higher levels of radiation and included an untrustworthy experiment to test people's hypersensitivity to radiation.

One of the programme's contributors, professor Michael Repacholi, also complained that his comment was treated in a way that was unfair to him.

Panorama didn't get a total caning and the BBC ruled that it was legitimate for the programme to focus on the public health issues raised by the chairman of the Health Protection Agency, Sir William Stewart.

The panel also found that the results of the electro-sensitivity experiment were correctly represented as being inconclusive.

However, Auntie also found a number of major failings.

"The programme included only one contributor (Prof Repacholi) who disagreed with Sir William, compared with three scientists and a number of other speakers (one of whom was introduced as a former cancer specialist) who seconded his concerns," the BBC ruling said.

"This gave a misleading impression of the state of scientific opinion on the issue."

The claims made in the programme caused a body in Tottenham to call for Wi-Fi use to be suspended in schools until a full investigation had been carried out.

"I quite frankly think we are frying children's brains," said Emma Jones, Labour councillor for Bruce Grove.

However, the broadcast came in for a lot of criticism once it had aired.

Ben Goldacre, who runs the Bad Science website, called it melodramatic, misleading television rather than an informed documentary.

"In 28 minutes of TV you could have given a good summary of the research evidence so that people could make their own minds up. But that would not get you as many viewers," he said.

Sales of Wi-Fi kit weren't affected, though, according to a magazine that monitors the sales channel.

Resellers reported record Wi-Fi sales in June despite the negative publicity generated by Panorama, CRN magazine said.