Three networks of suspected Islamic terrorists were being hunted by police and intelligence services last night amid fears that they are planning a strike on Britain with biological weapons. Convinced that an attack in Britain is inevitable, senior security sources revealed to The Observer that the groups are being sought following raids in London and Manchester by officers searching for the poison ricin. The sources admitted that tracing the terrorist groups was extremely difficult given the rise of a new generation of ‘clean skin’ extremists – young, radicalised Islamic militants with no previous links to terrorism. Full Story