The decision to launch the raid followed discussions between MI5, the anti-terrorist branch and the Health Protection Agency.
The Agency plays a critical role in protecting people from infectious diseases and in preventing harm when hazards involving chemicals, poisons or radiation occur.
We also prepare for new and emerging threats, such as a bio-terrorist attack or virulent new strain of disease.Residents said Forest Gate was a typical east London "mixed" community with a large number of Bengali and Pakistani families, along with a recent influx of Eastern Europeans.
One neighbour said the operation early this morning had involved "the most police I've seen in my life". Another neighbour said a family lived at the address. "They were respectable and nice people and we do not know anything else. They have always been nice to us," she said.
Always decent, good people. Like this "peaceful" Australian jihadist
"They have lived there for a long time. The kids all go to school locally."
That's because they're all assimilated, bruv.
UPDATE: A 5 Mile air exclusion zone is in force for the next THREE DAYS according to the BBC video feed
UPDATE 2: From Sky news
Dimple Hirani, 21, a student at London Metropolitan University, said she might have gone to school with one of the teenage boys from the family.I went to that University! I quit early from my degree due to the number of Bin Laden supporters, support for the 9/11 attacks and opposition to the war on the Taliban.
She said: "If it's the house I'm thinking of, I went to school with one of the lads. They were really nice lads and really nice people. I never thought anything of it. Lots of young Muslims these days are getting more religious, especially after 9/11. It's nothing to be suspicious about."Dark days indeed.
With many thanks to commentor A who sent this in