Well, they are not "secret" anymore...
Scotland Yard, Interpol, the CIA, MI-5, etc. are probably tarcking the source of the website and rounding-up the usual suspects at this moment. Over the course of the next few weeks, there are going to be a lot of militants crying for their mammas.
Those murderous cretins just did the wrong thing--making the Brits mad! They should have read their history books first!