In his first public speech on the national security threat for three years, Mr Evans will say on Friday that his officers are engaged in an "intense struggle" against Muslim radicals and Irish nationalists.
It is only "a matter of time" before Britain is the victim of an attack from extremists based in Somalia, the director-general of the security service adds.
http://www.telegraph.co.uk/news/uknews/terrorism-in-the-uk/8008033/Britain-facing-a-new-wave-of-terrorist-attacks-MI5-warns.html
http://www.telegraph.co.uk/news/uknews/terrorism-in-the-uk/8008033/Britain-facing-a-new-wave-of-terrorist-attacks-MI5-warns.html