Officers at a Scotland Yard briefing said they continued to be very concerned by the intelligence picture, with 70 investigations continuing and some of the information received described as "very sinister".
The head of the Metropolitan Police's anti-terrorist branch, Peter Clarke, said 60 people were awaiting trial in the UK for terrorist-related offences.
But he warned: "This is unprecedented, and the flow of new cases shows no sign of abating - if anything it is accelerating."
MI5 believes, from polls, that around 400,000 people in the UK are "sympathetic to violent jihad around the world", said Frank Gardner.
Within that number 1,200 people have been identified as being activists the security service believe are engaged in acts of terrorism at home and abroad, he said.
The first anniversary of the bombings of London will be marked on Friday by a national two-minute silence [and a fuck-off massive exhbition of Islam at an expense of £200,000 to the London tax payer - Ed]
"Islam and terrorism are two words that don't go together" - Brian Paddick, Senior Police Officer, and utter twat, at a press conference on 8th July.Britain is full of Islamophobes (how unfounded! how irrational!)
MI5 must be the only organisation in Britain that's not in complete denial regarding the British Muslim community. Well they'd better be - they are there to protect the country. Politically correct thinking in the intelligence community would be fateful. "Terrorists? What terrorists? That's BlairBushHitler trying to scare you into a war with the Martians!"