Excerpt:
In net-curtained rooms above a disused kebab shop on Cricklewood Broadway, a small group of middle-aged men were at work as usual when they found themselves at the centre of a national terror warning.
In offices sandwiched between a TV repair shop and a hair salon in the north-west London suburb, the men produce an Arabic-language site supporting Egypt's now banned Muslim Brotherhood.
At the same time, the prime minister announced a high-level investigation into whether the group – one of the Arab world's most powerful political organisations – was heading towards "violent extremism" in Britain and elsewhere.