Terror-related arrests in the UK have reached levels not seen since the aftermath of the 9/11 attacks in the US, Scotland Yard has revealed, as police have stepped up their response to the threat of radicalized jihadis returning to Britain from the Middle East.

http://www.ft.com/cms/s/0/6aeca81c-fa44-11e4-b432-00144feab7de.html#axzz3cV8j4qbr