Wind turbines can cause irritable bowel syndrome -- or so claims anti-wind farm group Country Guardian. Opposition to a planned 200 kW turbine at a school in Swansea, south Wales, has brought with it the latest, and perhaps most bizarre, accusations yet levelled by the group. In the local press, Country Guardian's Robert Woodward warns that people living near existing wind turbines have reported serious effects on their health, including irritable bowel syndrome and palpitations. Flickering shadows from turbine blades can drive people "bonkers" and could also be harmful to sufferers of epilepsy, he adds. The claims follow even more dubious tactics by the group. In November it was revealed that a letter of protest against a wind farm was sent to Pembrokeshire County Council, west Wales, purporting to be from a man from Slough in Berkshire, England. After the council sent him an acknowledgement, it came to light that the man had not written the letter. Later the man, who wishes to remain anonymous, told the Western Mail newspaper that he knows nothing about the proposed wind farm and had only visited Pembrokeshire once, as a boy.