Porn on most free public WiFi networks The Children's Charities Coalition on Internet Safety wrote to BT, the country's biggest internet provider, in March demanding urgent action. The coalition of charities, which includes the NSPCC and The Children's Society, had subsequently welcomed Mr Cameron's intervention. John Carr, the organisation's secretary, said: "We welcome any deal which is long overdue. Public access to the internet is a modern reality and we have to fund a way of dealing with this growing problem. Charities believe that more children may be seeking to access illicit sites in public places as parents are offered more sophisticated tools to restrict certain web content at home. In recent times, WiFi has spread rapidly in public places and is now available in many cafes, restaurants, shops and even on public transport. Speaking on the local election campaign trail, the Prime Minister said that the "clean" WiFi plans could help reinvigorate local high streets.