Under such a lurid headline, this is a newspaper story based on 'a senior intelligence source' and a "leaked" document - which may add some context to this thread.

The 200 British residents thought to be planning suicide attacks, either within the UK or overseas, represent one in 10 of the wider group of 2,000 terrorist plotters.
Link:http://www.telegraph.co.uk/news/ukne...cks-in-UK.html