MI5 warns the UK is facing rising threats from state actors as well as terrorists [SOUND]

# The UK’s domestic security service, MI5, is warning that Britain faces an escalating threat from hostile countries including Iran, Russia and China, while the terrorism risk remains huge. This as the UK has seen a 35-percent rise last year in the number of suspects investigated for possibly working for a hostile foreign government. MI5 head Ken McCallum says what is concerning is that one in five of the 232 terrorism arrests last year involved minors under 17: