This BBC report http://www.bbc.com/news/uk-38326238 does actually manage to mention, albeit as opinion not fact, that ISIS terrorists are masquerading as migrants in order to get into the UK.
'Islamic State militants are "moving in migrant flows, hiding in plain sight", the UK's defence staff chief has said.
Sir Stuart Peach said he was "worried" about the global reach of IS militants who destroy their identity documents to travel illegally into other countries.'
The BBC don't find the space to reveal to the British public that ISIS have stated that this is their objective and tactic. ISIS are open about this but the BBC have to protect the concept of refugees having to be welcomed into this country come what may.