The director of public prosecutions, Sir Ken Macdonald, put himself at odds with the home secretary and Downing Street last night by denying that Britain is caught up in a "war on terror" and calling for a "culture of legislative restraint" in passing laws to deal with terrorism.

"It is critical that we understand that this new form of terrorism carries another more subtle, perhaps equally pernicious, risk. Because it might encourage a fear-driven and inappropriate response. By that I mean it can tempt us to abandon our values. I think it important to understand that this is one of its primary purposes."

"London is not a battlefield. Those innocents who were murdered on July 7 2005 were not victims of war. And the men who killed them were not, as in their vanity they claimed on their ludicrous videos, 'soldiers'. They were deluded, narcissistic inadequates. They were criminals. They were fantasists. We need to be very clear about this. On the streets of London, there is no such thing as a 'war on terror', just as there can be no such thing as a 'war on drugs'.