The British home secretary has unveiled measures under which non-nationals considered to be promoting terrorism can be deported or excluded from the UK.
Charles Clarke today published a list of "unacceptable behaviours" such as inflammatory preaching and publishing views which foster hatred or foment terrorism will prompt immediate action - either deportation or a ban on entry.
Policy director of Liberty Gareth Crossman
A Home Office spokeswoman said the announcement followed a period of consultation which started earlier this month.
Some of Blair's anti-terrorism measures have angered civil liberties campaigners who argue they erode human rights and renege on international human rights commitments.
"What separates us from the terrorists is that we do not torture people or send them to be tortured," Gareth Crossman, policy director of Liberty said.
"If it is necessary to deport people we need more than self serving assurances to demonstrate that countries with appalling human rights records are safe."
Last month's attacks on London have sparked a raft of new anti-terrorism measures and British Prime Minister Tony Blair has said the "rules of the game are changing".