http://www.theregister.co.uk/2005/02/23/terror_bill_2005_analysis/
"The Prevention of Terrorism Bill effectively defines an offence as 'anything we say it is.' And this is supported to some extent by Charles Clarke's own stance. He does not at the moment consider that home detention is necessary, but he may think it is in the future, based on evidence he says he has but which he will not disclose. He argues that the current threat is far greater than the threat of the IRA was, hence the 'need' for the legislation in the first place, and again this is based on evidence he professes to have but will not disclose. 'The level of threat is what I say it is. You'll have to trust me on that.'"
