I was just Googling and doing some reading regarding the anti-terror raids last week and came across this article which I thought worth archiving:
"... At any given time MI5 monitors about 2,000 people in Britain who form an estimated 230 networks suspected of links to violent extremism. Each individual is subject to a sliding scale of monitoring depending on the agency’s assessment of the threat they pose and how close they are thought to be to "attack planning".
Each week a committee of senior MI5 officials meet at the agency’s headquarters in Westminster to review the status of each operation, upgrading and downgrading different investigations as appropriate..."
(Source: The Sunday Times, April 12 2009)
Very good article worth reading and re-reading.